I believed most things in the book... Didn't really seem like there was a lot of bullshitting or embellishing. He doesn't really have that impressing of a story - it's interesting, but not super impressive. And all the "little stories" is what I liked about it.

In fact, the only major embellishment was the title! He was not really a mob boss. More like a substitute teacher who is a fill in and who doesn't know what's going on.