Summary – Sixteen year old James, Sirius and Remus have been thrown into an alternate, twisted dimension where the worlds of Reality and Harry Potter collide. Imagine all the insanity they can get into armed with a knowledge from the Books and Muggle technology—And still very mischievous minds—inside not only Hogwarts grounds, but the magical world.

Inspired by the infamous list of 586/807 things I'm not allowed to do at Hogwarts; I decided I wanted to write a fic with some of these insane things happening and deigned that Sirius and James would be the best puppets for this sort of thing. Feel free to chime in with ideas along the way!

Just to make things clear; I'm going by the Lexicon's time line for ages and dates and what-not. I know there's a lot of muddled answers in that area, so I'm just gonna stick to this time line as best I can. If anyone comes up with anything more accurate or can help me figure out ages, birth dates and what-not, it is most welcomed! Also, since this is a mixed world I'm moving up the book publishings.

The fun probably won't really start for a chapter or two with the list items. The boys need to figure out their situation and stuff before the real insanity can begin. I'll try not to make it so slow, though! Scouts honor!

Ready? Here we go!

Disclaimer: I do not own Harry Potter (J.K Rowling), or the List (kupika's Demonic_Angel and a multitude of others). I'm simply using them for my amusement and the amusement of others.

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Chapter I

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Never would a day come afterward that Remus wouldn't take the opportunity to remind his two best friends just why they should listen to him more often.

Sirius, James, and Remus screamed and clasped their hands together tightly as they found themselves flying through a vortex of various colors and lighting. Pictures, visions and scenes swirled around them faster than the eye could see. A glimpse here or there of boys and girls reading various books, witches and wizards doing spell work, several battles. It was all so confusing and disturbing at the same time—Not to mention the clear feeling of apparation that made one think they were being squeezed through a very small tube.

When the boys were finally spit back out of the vortex, it was not in familiar settings at all. In fact, it wasn't even in magical settings. They found themselves sprawled on the ground together in the far reaches of an entirely too-big book store. Much larger than Flourish and Blotts, at least.

The section they had been dumped into was entirely deserted and, as Remus detangled himself from the other two boys, eerily silent. Further inspection gave way to the thought that the store was currently closed—All the lights were off and there didn't seem to be a single person in sight. It was with this in mind that he turned around and hissed for the other two, who were groaning and complaining rather loudly, to shut up. Both boys noted the irritated tone in their friend's voice and obligingly snapped their mouths closed before accepting help to their feet. Without a second thought, Sirius whipped out his wand and shed some light on their situation—Much to Remus and James' dismay.

"Padfoot, put that out! What are you thinking?!" Remus hissed, while James shook his head.

"We don't know where we are, Padfoot, we can't be doing underaged magic without a second thought!" He tried to explain calmly, gesturing around them, "What if we're in a muggle neighborhood? I certainly don't want to get my wand snapped!"

"Well, that's the point isn't it? We don't know where we are and the quickest way to resolve this all is to get some attention from the Ministry." Sirius huffed, crossing his arms but obediently putting his wand out, "Besides, it's too bloody dark in here. I can't see a thing."

"Of course it's dark in here, we're in the middle of a bookstore that's obviously closed right now—Which probably means it's night time." Remus told him in a matter-of-fact tone of voice. "I bet if we get out from between these book shelves and near the windows there'll be more light. Come on."

With that, the werewolf turned on his heel and led the way to the end of the passage, only pausing when James stumbled over something and let out a loud curse as he hit the ground. The two boys ahead of him turned around to find the messy haired male on the ground holding his foot and glaring at a thick hard-cover book that lay open on the ground before him. Worried, Sirius kneeled beside him while Remus picked up the book and examined it curiously.

"Alright, Prongs?" Pushing the others' hands away from his ankle, the young Black heir pulled up his friend's pant leg to squint at the skin beneath.

"I think I twisted it."

"Can you walk? We're not going to be able to do much without being able to see." The honey brunette asked, turning his attention from the book to his friends with a worried frown. It wouldn't be good to have one of them injured right now; especially if they really were trespassing in a muggle book store.

"Ah... Yeah. Yeah, I should be able to. Might need some help, though." James nodded, waiting for Sirius to straighten up before accepting two offered hands from his friends and hopping to a stand.

Immediately, his arms found their way over two different sets of shoulders and the three made their way much more carefully out from between the bookshelves. It didn't take long to locate a small sitting area set up in a corner beneath some high windows. Four short, plush arm chairs situated around a small sitting table. Spread out on the table were various magazines along with a desk lamp. Frowning slightly at the odd set up, Remus helped ease James into one of the chairs before turning on the lamp. Sirius and James, thankfully familiar with a good amount of Muggle things, did nothing more than spare a curious glance at the object before turning their attention back to the injured ankle.

Upon inspection, it was agreed that while he hadn't quite sprained it, James had indeed strained his ankle quite a bit. Remus commented that they were lucky and if he just stayed off it for a bit it should be fine. Of course, that meant they would be delayed in finding out the full capacity of their situation.

"Come to think of it, shouldn't someone have been here by now? Like, a Ministry official or an owl? After all, I did preform magic when we first got here. Normally that garners an immediate response in muggle areas." Sirius frowned, leaning back in his own chair and twirling his wand around idly.

"Think that maybe we're in a magical area after all?" James asked, quietly massaging his ankle while Remus took a better look at the book that had caused his mishap.

"No; if it were then there wouldn't be a ton of muggle mags and this light wouldn't be here." The book worm muttered, tapping the desk light with his wand. It flickered in response to the inherent magic.

"Well, maybe it's a double. A wizard running a muggle bookstore or something like that. It's been done, you know." Sirius stated, not able to hide his pride at knowing such a thing. Of course, the teen had thrown himself into learning things like that as an act of defiance towards his family and never missed a chance to flaunt the knowledge.

"Yes, I suppose that would be a possibility..."

"So we can use our wands freely, without worry."

"Not exactly, Siri—"

"Which makes this all much easier." Without waiting another moment and ignoring Remus' cries, Sirius leaned over to James and tapped his ankle with his wand, confidently stating, "Episky."

James sighed in relieve as the pain in his ankle eebed, but the light bulb on the table buzzed and crackled. Warily looking at it, the three barely had enough time to hit the ground before the light bulb exploded and showered the table and chairs around it with hot bits of glass.

"Great going, Padfoot... You of all people should know that magic and electricity don't mix." Remus grumbled as they climbed up off the ground, pointing his own wand at the mess and muttering, "Reparo."

As the glass flew back into the form of a light bulb, Remus quickly reached over and turned it off to avoid another episode. Of course, it still rattled slightly even without the electric current running through it and a small spark came from the nearby plug, making all three teens hurriedly back away from the area. Three Lumos spells later, the boys relocated themselves to the floor in a different corner and quietly went over ideas as to what they should do now. After a few moments, it was agreed that they needed to check and see if there was any way to leave the building without setting off any alarms. It didn't take long to scope out a plan on how exactly they were going to conduct the search and soon enough, the three parted ways to look around.

They didn't come back together with very high spirits. All three had been utilizing a modified version of the Four-Point Spell to find any exits. Through their search they had discovered the building to have four levels with one below and two above ground level. There were three exits, two on ground level and one on the fourth floor that Sirius assumed went to the roof and was for emergencies—All of which were locked. The two on ground level were the front entrance, and a back exit that Remus assumed was for book shipments to be brought through. Over the course of the search he had changed his belief that they were in a book store to being in a library. A realization that had calmed him a bit over the issue of trespassing—If it was a library it would be easier to slip out unnoticed in the morning should they fail to leave sooner.

"Well, we could always just unlock the doors magically and then relock them when we're back out. That's the easiest solution, after all." James stated, spirits quickly rising when he remembered that they could, indeed, do magic without consequence for the time being.

"Yeah, so what's the problem?" Sirius nodded his head in agreement, watching the expression on Remus' face as he stared out the front door of the shop from their hidden away spot—The doors were made of glass and it would be ill advised to stand in sight of anyone who passed by out of chance.

"I want to know more about where we are, and what day it is. Stuff like that; This is the perfect place to do it I think. So before we leave, we should take a look around behind the desk." The final member of the trio said after a moment, looking at the others, "Remember, we didn't get here through any conventional means so we need to make sure of the small details to fit in."

Sirius snorted, "Moony, you really think that we've done more than move locations?"

"Actually... He has a point, Padfoot. We should double check." James stated, nodding to the irritated looking book worm and patting both of their shoulders. "Then we can get out of here and hopefully go home... Only, the desk is in plain sight from the door and I'm pretty sure I see a camera set up over there..."

"Yeah. That'll be troublesome. It'd be better if no one thought anyone was here." Remus sighed, leaning back on the heels of his feet and glancing towards the desk thoughtfully. "Disillusionment charm?"

"Nah, that'll only keep us from being seen by muggle eyes. It won't hide our sifting through stuff." Sirius replied, looking over in the direction of the desk now as well with a small frown. Then, his eyes lit up and the dark haired boy grinned, "Why don't we just turn it off? Prongs, you have the cloak with you, right?"

"The...Yeah, yeah I have it." James reached behind him and pulled the cloth in question out from under his robes where it was normally kept in anticipation of needing a quick get away.

"Brilliant. Give it to Remus; He knows how to work all that stuff better than us. Moony, once you turn it off signal us and we'll disillusion ourselves and come over." Once Sirius finished, he beamed at the other two and received nods of agreement for the well set plan. "Once we're done, we can just turn the camera back on and hopefully the muggles will just think that it malfunctioned or something."

"Good thinking, Padfoot!" James clapped him on the back and tossed the Invisibility Cloak to Remus, who nodded and reached up to cast the disillusionment charm on himself before vanishing under the cloak.

"See you in a moment."

The two friends waited in anticipation for a few moments before a flash of light from Remus' wand tip prompted them to head over. Quickly and quietly, they sifted through the papers on and behind the desk in search of a date. No one so much as gave thought to turning on one of the computers that sat on top of it. It was quietly agreed that the light from the computer would draw too much attention from anyone outside—More than the dimmed light of their wands, at least.

"Here! Found a newspaper." James held up the item in question and waved it around for the others to see. They darted over to him and peered over either shoulder as he unfurled it. "London."

"Brilliant; What's the date, does it say?" Sirius asked eagerly.

"Let's see here...July first..." The trio frowned. That was several days forward from when it was supposed to be in their time, and James continued to read with a bit more wariness, "Nineteen ninety six?!"

"It's supposed to say nineteen seventy five!" Sirius exclaimed in protest, yanking the paper from his best mate's hands to reread the print himself. "Bloody hell! We just missed twenty one years of our lives! Ugh, at least we're in London."

"Well, at least we know the year now..." Remus murmured from between his hands, where he had dropped his head to after the announcement of the date. "Not exactly the day, though, since we don't know if that's today's paper or not."

"Right. We better keep this, though, to look through later for any useful bits of information or whatever." James muttered, snatching the paper back from Sirius and rolling it up before shrinking it and stuffing it into his robes. "C'mon, Padfoot. Let's get out of sight so Moony can turn the camera back on and we can get out of here."

Five minutes later, the three teenaged wizards snuck out the back entrance of the library into an empty alley way. Locking the door behind them, the three darted down the alley and out into the late night bustling of London. The three tried not to compare it too much to the London they knew from twenty years ago, and Remus repeatedly told himself that there really was not much difference in the times. Then again, they had never paid much attention to the city outside of random roaming and things like that. Now, they hurried forward through the streets until they came with much relief upon the Leaky Cauldron. At once, they darted inside the establishment and looked around.

Tom was still playing the role as barkeep, though he was obviously older now. He looked up at the three teens curiously for a moment before greeting them.

"Could've sworn I'd just traveled some twenty years back in time when you walked in." He told them cheerfully, "Spittin' images of them Potter, Black, and Lupin kids back then. What're your names, then?"

The first statement made the trio squirm uncomfortably, but the question quite obviously made them panic. James and Sirius' eyes widened upon realizing they couldn't use their real names. Remus, however, seemed to remain calm and smiled at the old barkeep while thinking hard. Of course, the only thing that came to mind was the text from the book he had been scanning in the library. Thus, that was what he wound up getting inspiration from.

"Hello. I'm Rem—my. Remmy Rowling." His brow furrowed on that one while James and Sirius suppressed their laughter. It was a nickname that Sirius used often when he wanted to annoy his friend, and Remus definitely disliked it. "These are my cousins...Jimmy and Artie Rowling."

Immediately, the snickering ceased and the other two Marauders straightened up with mirrored expressions as Remus wore. It was probably a good thing they were in mixed company right now, or Sirius may have tackled him right then and there. There was no question where he had gotten 'Artie' from and it most definitely wasn't Sirius' own name. Despite this, however, he was completely aware of the way his friend was bristling and prepared himself throughout the time it took to rent out a room for the explosion that was sure to come. Sure enough, once they were safely locked away in their room James cast a hurried Silencing charm and both turned to glare at him accusingly.

"Artie?" Sirius hissed, advancing on the slowly retreating form that was Remus, "You could've chosen anything to use and you go with my brother's middle name?!"

"Your entire name is impossible to shorten into something remotely proper-sounding, Sirius." Was the ready reply as the honey brunette collapsed on one of two beds in the room.

"Yeah. Be happy you didn't get stuck with some ridiculous nickname like Jimmy." James chimed in, glaring.

"Or Remmy. Look, it's not forever. Just a front until we figure out what to do." Remus sighed, rubbing his forehead once more before looking up at the other two sixteen year olds. "So, what are we going to do?"

"Dunno. Live out our lives in the future?" Sirius sighed, flopping onto the bed next to his friend, anger completely drained, "I doubt anyone will believe us if we told them the truth anyways, so there's not much we can do."

"Well, we have to finish school. Can't do that without a proper alibi and I seriously doubt Dumbledore will be lied to easily, you know." Remus argued, sighing as well.

That was when James straightened up and grinned, "Dumbledore!"

"Eh?" Both of the bickering friends looked curiously at the messy haired male who was still grinning stupidly like he normally did when struck with a particularly brilliant plan.

"Dumbledore, we can go to Dumbledore! He'll believe us, he has to. After all, we're from the past." James gestured to himself and then them, "We look exactly like we did back then—And don't you think everyone would be wondering where we've been these last two decades?"

"James...I don't know if anyone's looking for us. Tom didn't mention anything about an unfortunate disappearance or anything like that." Remus frowned, but otherwise sat up a bit straighter, "But it sounds like our best shot."

"Eh, sure. Let's do it." Sirius muttered, flopping back down onto his bed, "Tomorrow, though. Artie is starving and could use a laugh right about now. Let's go explore the alley."

The other two agreed and together, the three friends found their way down the stairs and out into the alley behind the pub. It was time to find out just how much time could change things...