Reminds me of http://bookcrossing.com http://bookcrossing.com which has been around for a while, lets you put an ID number in each book and then you can track i

Reminds me of http://bookcrossing.com http://bookcrossing.com which has been around for a while, lets you put an ID number in each book and then you can track it as others find it. I released a handful of books in NZ and London about 10 years ago via bookcrossing