Gonna paste the same thing I posted to other forums:

The real Tommy DeSimone doesn't quite deserve to have the name he has in crime history. If it weren't for the fact that Joe Pesci is capable of being so funny and so scary on camera, very few people would know that DeSimone exists. So it's obvious that whoever is behind this book is mooching off the reputation created by Goodfellas. This fact alone is a testimonial to Pesci's talent, I guess. The writers should send Pesci royalties.