A/N: Hi readers, I have never done a cross-over, but I thought it was time I did. I am a vivid watcher of both Bones and Castle and I also managed to add some criminal minds in here too, so for those of you who have seen that, you'll pick up the preference instantly. =D

I hope it's not a disappointment.

"I don't understand why we have to be here, Booth," Brennan complained as she poured herself a glass of water from the jug. Booth had offered to do it, but she had slapped his hand away and told him she was not incompetent.

Booth leaned against the table watching partner sip at her drink. "Because despite the fact that you think you know everything there is to know about the world, you don't," he teased. "There is always something new to learn."

"I have never insisted I know everything, Booth," she protested. "I just know more than you."

Booth rolled his eyes. "Then just consider this a new experience. You need to know more about the criminal mind than how to defend yourself with a brown belt."

"I have a black-belt, Booth," she corrected him.

"Whatever. You might learn to be tactful and also how to mingle with people, while you're here too."

"Why would I want to do that?" she challenged.

"It's good for you."

A giggle erupted from beside them, and both Booth and Brennan turned to find a woman in black slacks and a red leather jacket, sipping on a glass.

"Is there something humorous about eavesdropping?" Brennan demanded curtly.

The woman blushed. "Forgive me, I'm detective Kate Beckett, NYPD," she thrust her hand out to Brennan, but she didn't take it, instead Booth took her place.

"I'm Special Agent Seeley Booth from the FBI, and this is my partner Dr. Temperance Brennan. You'll have to forgive her, she isn't familiar with socialization."

Brennan slapped Booth hard in the arm. "I'm a forensic Anthropologist."

"I am sorry if I offended you, Dr. Brennan, I simply saw something in the two of you that reminded me of my own partner."

A man stepped up beside Detective Beckett and grinned widely. "Did you just call me your partner?"

She rolled her eyes. "And so it begins," she muttered under her breath.

"Are you going to introduce me to these, fine looking people?"

"Are you going to behave yourself?" she shot back.

He titled his head cockily and smiled. "Not as long as you're around."

"Castle!" she growled.

Booth and Brennan watched the two of them with obvious amusement. Brennan finally realized what Detective Beckett meant by her comment. There was a similar banter between both couples. It was familiar.

"Agent Booth, Dr. Brennan, this is my rather immature and childish, partner, Richard Castle." Detective Beckett said refilling her glass.

"The famous writer?" Booth asked in surprise.

"Yes, that's me," Richard Castle answered. "And you're Temperance Brennan, aren't you?"

Brennan nodded. "Yes."

"You write all those books on Anthropology. I've read them all, they're fantastic. I quite enough the fiction novels you write on the dynamic relationship between Ryan and Kathy. Is that based on your relationship with Agent Booth?"

"No," she denied. "Why does everyone think that?"

"It's about me," Booth insisted. "Nikki Heat is based on Detective Beckett right?"

Detective Beckett evidently blushed. She knew what kind of scenes were in those books, she read them, but to know that other people read them and looked at her as if she did any of the things Nikki Heat did, caused her cheeks to redden.

"Only the good stuff," Castle said.

Booth laughed.

"Oh," Brennan nodded with the realization of who he was. She had picked up one of his books, and had been sorely disappointed. "Yes, I have read one of your books… the first Nikki Heat book. Heat wave… is that right?"

Richard Castle beamed. "Yes. What did you think?"

"I thought it was distasteful. It was dramatized and disappointing. The romance side of things was quite well done, but as for the way the hero caught the criminal was overdone. I didn't care for it."

Richard castle took a step back, clearly stung by her words.

"I think he's fantastic," Detective Beckett said coming to his aid.

"I understand you say that because you work alongside him-"

"No, Dr. Brennan, I don't say that because he's my partner. I have been reading his books as far back as his first. I have followed his career, and those books have gotten me through the toughest times in my life," she stated defensively.

Richard Castle said nothing as he stood back listening.

Booth wondered off for a moment, leaving Brennan to fend for herself. She'd gotten herself into this mess, and he was sure that she could fight her way out. She might even learn a thing or two about tactfulness.

He returned to Brennan when they were all called to assemble in the hall.

Richard Castle and Detective Beckett wondered off to find a chair. "So my books have gotten you though some tough times, huh?" Richard Castle said to his partner.

"Shut up, Castle," she growled.

Booth could see how Detective Beckett saw the similar personalities in their partnership.

"I didn't like her," Brennan stated.

"You don't like anyone," he replied. "You need to widen out, Bones. I thought she was a delight, and rather pretty if I may say so."

"No, you may not say so." Brennan sighed heavily and the two of them took a seat in the crowd of people.

… … … … …

"Why are you grinning like that?" Brennan asked as they made their way across the street towards the black SUV.

"I was just thinking about someone I met today, how alike you are," he smiled almost knowingly.

"I don't know what that means," she muttered.

"I bet you he has never said that. He's not just smart, he's a genius. He too, knows everything," Booth winked.

Brennan tried to hide the interest from her voice. "Who is he?"

"He works with the FBI, on a special team that specializes in criminology, they get into the minds of serial killers and catch them by learning why they do what they do," he explained.

Brennan frowned. Oh No, she groaned pulling a face. Spencer Reid. Brennan had been hoping that boy had dropped off the face of the earth. He did know everything, his IQ was 187. Her IQ was certainly less than the average person when compared to his, and the boy was much younger than she was. He was in his mid-20's if she remembered rightly. Brennan had met him once, and hated him on impulse. He was far too smart. Someone who was that clever with their mind was a danger to society.

"You know him already," Booth said. "Don't you?"

"I do. His name is Spencer Reid."

"And you hate him?" he smiled.

"No," she denied a little too quickly.

"Yes, you do," Booth insisted. "He's smarter than you, and younger than you, and-"

"If you say he's hotter than me I will be forced to use my black belt technique," she warned.

Booth only laughed. "Want to get a coffee, oh lowly one?" he asked teasingly. He was lapping up every moment of this. It was rare for him.

"If you admit, I'm more attractive, than Spencer Reid."

"Oh, no comparison," he winked.

Brennan nodded pleased with his answer. "Sure," she said sarcasm.

"Now Bones, did you just crack a joke!" he laughed.

Brennan leaned back in the passenger's seat of the SUV, looking out the window. She knew there would be a day that Spencer Reid would re-enter her life, she was just hoping it would be closer to the end of the world.

It was just a little bit of fun… I LOVE all these characters btw, I just wanted to play around with them a little… now keeping in mind this was the VERY first cross-over and I hope to improve over time, it never hurts to review… *shrugs* just saying is all… and ps. I love you… yes, daddy told me it works every time. ;)