Here are the titles and covers of the final two 39 Clues adventure books.
Book 9: Storm Warning, by Linda Sue Park, comes out on May 25th.
In this thrilling ninth installment, Amy and Dan hit the high seas as they follow the trail of some infamous ancestors to track down a long lost treasure. However, the real prize isn’t hidden in a chest. It’s the discovery of the Madrigals’ most dangerous secret and, even more shockingly, the true identity of the mysterious man in black.
Book 10: Into the Gauntlet, by Margaret Peterson Haddix, arrives in stores on August 31st.
Are Amy and Dan ready to face the truth about the Cahills and the key to their unmatched power? After a whirlwind race that’s taken them across five continents, Amy and Dan face the most the difficult challenge yet- a task no Cahill dared to imagine. When faced with a choice that could change the future of the world, can two kids succeed where 500 years worth of famous ancestors failed?
The multimedia series—each volume written by different children’s book author—is phenomenally popular in the 8-12 year-old set. It centers around Amy and Dan Cahill, a brother and sister who are, at their grandmother’s behest, searching the world for the 39 clues to the Cahill family’s power. Dreamworks has secured the movie rights to The 39 Clues; Steven Spielberg may direct.