The 39 Clues - Book Four: Beyond the Grave

Beyond the Grave is the fourth book in The 39 Clues series. It came out on June 2, 2009 and it is written by Jude Watson. In it, the protagonists of the series, Amy and Dan Cahill, travel to Egypt because of a clue they discovered in The Sword Thief. In this book, many secrets are revealed, including information about Grace Cahill's past. The symbols in the middle of the book translate "Alistar was there the night they died."

The 39 Clues - Book Three: The Sword Thief

The Sword Thief is the third book in The 39 Clues series. It was published on March 3, 2009. The Sword Thief follows the first two books in the series, The Maze of Bones by Rick Riordan and One False Note by Gordon Korman.

The 39 Clues - Book 2: One False Note

One False Note is the second book in The 39 Clues series. It was published by Scholastic on December 2, 2008. In this book, Amy and Dan learn about Mozart and travel to Vienna, Austria to search for the second clue in the 39 Clues competition. One False Note entered the Children's Books New York Times Best Seller list at number one on December 21, 2008 and stayed on the list for children's chapter books for 12 weeks.

The Cat Who Could Read Backwards by Lilian Jackson Braun

A stabbing in an art gallery, vandalised paintings, a fatal fall - this is not what Jim Qwilleran expects when he turns his reportorial talents to art. But with his partner, Koko the Siamese cat, he sniffs out clues and confounds criminals intent on mayhem and murder.

Manga Math Mysteries 5: The Ancient Formula: A Mystery With Fractions

 "A puzzle from Sifu's grandfather has everyone stumped. A circle divided into wedges shows part of the formula for an ancient medicine. But some wedges and another circle are blank, and no one knows how the original formula disappeared! Joy, Adam, Amy, and Sam will have to use clues--and fractions to discover the truth about...