i'm writing a book

its a murder mystery. so far i just have the ending. here it is:

"How will I ever get out of this mess?" Karen wondered, struggling to free her hands from the taut rope. Then she realized that even if she wasn't bound to the chair, she would have to get out of the house and back into town. This was certainly scary to Karen. And mysterious.
She figured that if she could move her chair over to the window maybe she could figure out where she was. She started inching over slowly until....thud! She looked down to find the dead body of........some guy she didn't know. But he was dead! Suddenly the door opened. It was a tall man. She assumed it was the murderer. It was. She gasped. He laughed kind of menacingly.
"Thats right" he said, "I am the murderer. But I'm not who you think I am."
He took off the mask he was wearing that I forgot to mention.
"Oh my god, I never would have guessed!" Karen exclaimed.
It was.........

Larry!

the end.



I figure now that I have the ending, the rest will be easy, just work backwards. So i'll probably slap a beginning and a middle on this bad boy tomorrow and send it to the New Yorker.