Charlie Thorne and the last equation

Summary/Review: Decades ago, Albert Einstein devised an equation that could benefit all life on earth-- or destroy it. Now a diabolical group known as the Furies are hunting for the equation. In desperation, a team of CIA agents drags Charlie Thorne into the hunt. Charlie is a genius... a thief... and not old enough to drive. But she must crack a complex code created by Einstein himself, survive in a world where no one can be trusted, and fight to keep the last equation safe once and for all. -- adapted from jacket