The Book of an Assassin

This is surprisingly not a short story. Yay! Anyways, this is an assassin's diary that follows him on every mission that he can take it with. I know this description might be confusing on what the story is about, but you'll see what I mean. I will try to work on this as frequently as I can. P.S. there might be a slight bit of blood/mature content throughout this story.