It a great book and a lot better than the movie, IMHO. the reason i said this? lots of characters are not in the movie and info's on the main characters. good examples are Luca Brasi and Al Neri's background, the story behind Sonny and Lucy and how Tom Hagen get into the Corleone Family . . .

GoodFella

Life Goes On

"What're You Gonna Do Now, Tough Guy?"
The Notorious Phrase that Would'nt Go Away.