I have 24 books eligible for the program, which seems like a high number based on the comments here.

I've probably ordered 600-700 books since 1999.

Most of the Matchbook matches are at the $2.99 price point. None are listed for free. Most are fiction. Most are from my 1999-2004 purchases.

Incidentally, four (out of six) books from my first Amazon order were eligible.

I suspect (hope) that more publishers sign up in the near future.