Book review: Who is Tom Ditto?

Danny Wallace is best known for non-fiction books in which he takes on high-concept challenges; this venture into fiction also has a bit of a high-concept edge, as the lead character of Who is Tom Ditto discovers a subculture of people who literally follow and mimic strangers to try out their lives for size. Tom is a radio newsreader whose girlfriend disappears, leaving a cryptic note, and in the middle of trying to figure out what's happened to her he also has a number of high-profile mishaps at work. In the process he discovers that his girlfriend was part of this subculture of stalking and copying, and that he never really knew that much about who she really was. Enjoyable enough with a couple of good comic setpieces but it's not one that's likely to stick in my mind for long.