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...

Nine-year-old Nicholas Benedict, an orphan afflicted with an unfortunate nose and with narcolepsy, is sent to a new orphanage where he encounters vicious bullies, selfish adults, strange circumstances, and a mystery that could change his life forever.

"Twelve-year-old Jake McQuade-the smartest kid in the universe-goes to a camp for geniuses, where he goes up against the Virtuoso quantum computer, the smartest machine in the universe"--

"Tween twins Coke and Pepsi McDonald have finally reached the last leg of their wacky and dangerous cross-country road trip, but they must fend off a host of strange assassins before they reach their home in California"-- Provided by publisher.

From childhood, Katherine knows she is different, and that her parents are not who they seem to be. But in becoming a mathematician, she must face the most human of problems-who is she? What is the cost of love, and what is the cost of ambition? On her quest to conquer the Riemann Hypothesis, the greatest unsolved mathematical problem of her time, she turns to a theorem with a mysterious history that holds both the lock and key to her identity, and...

Socially awkward fifth-grade genius Nate Bannister recruits his classmate Delphine to help him reverse one of his many experiments (a dinosaur-sized, invisible cat) while foiling the schemes of the world's most dastardly organization, the Red Death Tea Society.

Sixth-grade genius Nate Bannister, with his talking car Betsy and super-powered pets Bosper the Scottish terrier and Sir William the gull, teams up with his friend Delphine to stop the Red Death Tea Society from unleashing angry bees on the city of Polt.

When seventh-grader Jake McQuade mistakes the world's first ingestible knowledge pills for jelly beans, he suddenly knows all about physics and geometry and can speak Swahili (though Spanish would be a lot more useful)--but his sort-of girlfriend Grace thinks they can use his new found brilliance to save their middle school from the new principal, who is conspiring to get it shut down.

The CIA forces twelve-year-old Charlotte "Charlie" Thorne, a rebellious genius, to use her code-breaking skills on an epic global chase to locate Einstein's last equation before dangerous agents discover it and unlock the solution to harnessing energy.--

Traveling to Antarctica for a prestigious science competition, twelve-year-old Jack and his genius foster siblings, Ava and Matt, become caught up in a mystery involving a missing scientist.