Book club with a difference
by Paul Miller
You might have come across this before but I like the idea. BookCrossing is a community that acts as a sort of distributed library where once people have read books they "release" them for others to read. Quite often people do this by leaving them in a public place (I found one on a park bench in Tuscany). A sticker inside the book allows the finder to trace the book via the website and chat with other people who've read it.