Last month or two -
T J English - The Westies. An old, and well respected true crime book about NY's old Hell's Kitchen Irish mob faction. Also his book "Whitey's Payback", which is a collection of his writings for various magazines for the last 20 years or so. A decent portion of which deals with Whitey Bulger.
I re-read a bit of George Pelecanos's "The Double" and "King Suckerman", simply because they were on the table, and I enjoy his writing style. He and Robert Crais have slowly made their way to the top of the mystery writers pile now that Block, Westlake, and Leonard have slowed down or passed.
Ran through an old pulp novel - Dan J Marlowe's "The Name of The Game is Death". It's based around a bank robbery, and reads like an old "Parker" style novel, just a bit darker, and more fanciful.
Right now, I'm 2/3rds of the way through Chester Himes's "Real Cool Killers". It's an old book, based around a pair of Harlem based detectives. It's a fun book, and the interplay between the white and black characters is an interesting snap shot of the time. You do have to make a few leaps of faith with some minor plot points though.
Next on the burner is probably "Clubland" about the whole Michael Alig / Peter Gatien saga.