"Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair Oh. Could they have been foolish enough to make an alliance? Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded . . . and the price to uncover them just might be lethal."--Publisher.

Lucas has just lost his father in Afghanistan and to help him cope, his grandmother sends him to Camp Kawani. While there, he learns of the lost treasure of Thomas Jefferson Beale, a local legend of a hoard of gold buried in the mountains 200-years ago. The location is encrypted in a set of codes no one has ever been able to decipher. Lucas becomes obsessed with finding the gold to save his home and leads his newfound friends into a dangerous mission...

As Cruz and his friends continue to search for the third piece of the cipher, a mysterious message arrives suggesting that someone close to him is working for Nebula, leaving Cruz unsure of who he can trust.

"Could the Mark Twain books hidden through Book Scavenger contain clues about the string of recent arson fires plaguing the city? And will Emily and James uncover the mystery before the arsonist comes after them?"--

"In 1814, redcoats burned the White House to the ground. In 1889, Harry Houdini discovered a trick that would save his life. In 1955, the U.S. launched the world's first nuclear submarine. And one family pulled the strings behind the scenes at each of these events: the Cahills--the most powerful family the world has ever known. Now the Cahills have opened their vault and dangerous secrets are pouring out. This book contains three of them--three stories...