Charlie Thorne and the Last Equation

"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 are closing in on its location. In desperation, a team of CIA agents drags Charlie into the hunt, needing her brilliance to find it first even though this means placing her life in grave danger."--Provided by publisher.