After tracking down incredible discoveries by Einstein and Darwin, Charlie is back. This time, the great ruler Cleopatra has left behind an extremely valuable and powerful treasure, its location encoded on an ancient stone tablet. In 30 BCE, Cleopatra and her husband, Marc Antony, lost their war against Octavian for control of the Egyptian Empire. However, Cleopatra knew Octavian was really after the mysterious item that was the source of all her...

Eight-year-old Iva Honeycutt is determined to make her first great discovery this summer--the treasure buried in her small town of Uncertain, Virginia, that her great-grandfather sought for years--if only she can keep her pesky cousin Heaven from interfering.

Imogen Crim has been terribly bored since she returned to Blandington. So when her nemesis-turned-best friend Ava Kruk offers to swing by the Crims' dreadful beach vacation in Dullport and rescue her in her stolen submarine, Imogen quickly agrees. A real heist with a real villain-this is the excitement Imogen has been looking for. But before Imogen and Ava can accomplish their mission, the entire Crim family catches up to them, dressed in their pirate-y...