I was browsing the Google Play store and noticed one of the banner advertisements was for $5 off a book purchase of $5.01 or more. The below link should take you to the promotion, otherwise I clicked on music, movies, and books to see the banner ad (there were 5 ads to scroll through).
https://play.google.com/redeem?co…3J1
The $5 comes off instantly on checkout and ends January 16th. It worked on both my and my wife’s accounts.
Note that this is a different promotion than the one that expires Jan 4th ( ).