The normal disclaimers here, I DONT OWN HARRY POTTER!!! I'm just borrowing the characters. This is an idea I had about the third book (Prisoner Of Azkaban), Instead of getting on the knight bus, what would Harry's life be like if he met Sirius Black instead. Please be nice, its my first fan fiction

After deciding to take his wizard money from Gringotts and hide, Harry began rummaging around in his trunk for his invisibility cloak when he felt something strange in the air, like he was being watched, so he stopped and looked around seeing darkness everywhere.

After thinking for a few minutes, he resumed looking for his cloak, then he heard something behind him, the crunching of dead leaves under the feet of something heavy, He turned to see what was there and came almost nose to nose with the biggest dog he had ever seen.

HARRY POTTER AND THE AZKABAN PRISONER CHAPTER 1 MEETINGS Harry was frozen with fear, he couldn't move a muscle, and it seemed he even lost his voice, so he just stared right into the eyes of the beast and started praying it wasn't hungry.

Then if seeing a giant black shaggy dog wasn't weird enough, a second later there was a faint popping sound and the dog had changed into a tall thin man with long greasy black hair and an unhealthy gaunt face, and almost ghostly pale skin.

Harry sat stupefied about what had just happened, then the man spoke in a strangled and seemingly unused voice.

"Harry?"

"Y-Yes, M-My names H-Harry"

There was silence for what seemed like minutes, then the man spoke again in a more normal voice.

"Harry Potter?"

Y-Yes, are you from the ministry?, I didn't mean to do it I swear I just."

As Harry began rambling the man interrupted with an almost alarmed expression.

"WHAT?, is the ministry here?, we have to leave, I need to speak to you in private."

"W-well, OK"

"But I have to travel in my animagus form, you dont mind dogs do you?"

N-no, not at all"

The just as amazing as the first time, the man transformed back into a huge, black, shaggy dog, and began leading harry down the street, with Harry dragging his trunk along behind him.