The Hanged Man's Song, by John Sandford

I've read this before, it turns out. I enjoy Sandford's books, and Lucas Davenport is one of my favorite literary cops. I imagine him and Harry Bosch having drinks and talking about their respective cases. This one's a Kidd book, though, so about computers. It's kind of neat to read a book about computers and see how it was both ahead of its time and now completely dated.