Per Heather, this is a $1.99 ebook deal today over at Amazon US. 
 BONUS : this book will be FREE as an audiobook starting on June 13. There will also be many other new, popular, and classic books for Sync's free audio summer deal that they host each year. Titles such as Of Poseidon, Grave Mercy and others are being offered up. The summer event starts May 30. 
 Sign up for your free books by checking out this link