While living on a moon base with fellow lunarnauts, Dashiell Gibson investigates the murder of one of the moon's most prominent doctors.

Twelve-year-old Teddy investigates when a popular Texas zoo's star attraction--Henry the hippopotamus--is murdered.

"Decades ago, Albert Einstein devised an equation that could benefit all life on earth -- or destroy it. Fearing what would happen if the equation fell into the wrong hands, he hid it. But now a diabolical group known as the Furies is closing in on its location. In desperation, a team of CIA agents drags Charlie into the hunt, needing her brilliance to help them find it first -- even though this means placing her life in grave danger. In a breakneck...