These days I use Google Books to purchase and read most of my books. It has a Wish List feature that is pretty handy. Occasionally a book on my list get discounted and I get a notification. Today there were 3 discounted down to $1.99. James Lee Burkes Wayfaring Stranger, Black Spartacus about the Haitian slave revolution and In Giovanni’s Room by James Baldwin. Except only the Burke charged as $1.99. The other two were roughly $10 and $14. I would not have noticed had I not checked the (email) receipt. Got immediate refunds on both. What is the deal here, Google?