The Hanged Man's Song (A Kidd Novel, Bk. 4)

Kidd is a professional thief for the Internet age: a cyberprowler, a hacker extraordinaire. In The Hanged Man's Song, he gets word that one of his key contacts - a superhacker known only as Bobby, whom Kidd has never met but has relied on many times - has disappeared. Kidd and an old buddy, both of whom could be compromised by data in Bobby's files, go looking for him. Finding his brutally murdered body draws them into a Hitchcock-esque intrigue that eventually involves stolen government secrets, crooked politicians, and a rogue CIA agent who's as crafty as he is creepy.