And, in response to many requests from people who love the fast (and sometimes free) shipping that Amazon offers, we've decided to now offer the two-pack of Your Turn on their site as well. (Click on "see all buying options" to get the 2 pack offer).
To get us off to a good start, it's discounted for the next week, two copies for less than $28. You can always buy the multi-packs on the original site as well. (And here's a ChangeThis sample of the book).