The first and fifth novels of the Bonnie Pinkwater mystery series are on sale ( $.99) for the weekend of the 19th and 20th of September, the Year of our Lord 2015.
Actually the deal goes like this: Napier's Bones is on an Amazon Countdown. Saturday and Sunday (19 and 20) it is $.99. Come Monday and Tuesday (21 and 22) it sells for $1.99. On Wednesday and Thursday (23 and 24) the sale price is $2.99. Then on Friday September 25 the price goes back to normal $3.99
As for The Witch of Agnesi, the first Bonnie Pinkwater mystery, it is $.99 for the entire month of September. The sale prices for these novels only include the Kindle versions.
Bonnie is a female mathematician who uses her skills to solve murders in the small Colorado town of East Plains near Colorado Springs. I don't want to brag, but we're talking life-changing literature here my friends. Enjoy!!