Michelle McNamara's book about The Golden State Killer is finally arriving today! She was married to Patton Oswald and died unexpectedly while she was in the middle of writing it. He brought in other writers to make sure that her work would be finished. I'm obsessed with the GSK and wish she could have lived to see her book published.
As far as I know it is purely audio, but I'll Be Gone in the Dark is a pretty good companion piece. Hell, IBGITD is damn good on its own merits - hell of a story behind it!