Jimmy Breslin for The Good Rat. That book is by far the most entertaining book I have read yet. He was not deep on the details, but his writing style and humor are second to none.

Raab for 5 Families. In depth and detailed, the de facto book for NY LCN history. I wish he would write more.

Outside of NY, big plus 1 for Daniel Waugh. Extremely well researched and written, heavy on the details and explanations or how / why events occurred.