“Fast-paced, smart, and action-packed...a real page-burner.” —Chris Grabenstein, #1 New York Times bestselling author of the Mr. Lemoncello’s Library series From New York Times bestselling author Stuart Gibbs comes the first novel in a thrilling new series about the world’s youngest and smartest genius who’s forced to use her unbelievable code-breaking skills to outsmart Einstein. Charlie Thorne is a genius. Charlie Thorne is a thief. Charlie Thorne isn’t old enough to drive. And now it’s up to her to save the world… 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. In a breakneck adventure that spans the globe, Charlie must crack a complex code created by Einstein himself, struggle to survive in a world where no one can be trusted, and fight to keep the last equation safe once and for all.

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 a breathless adventure that takes her across the globe, Charlie must fight for her life against ruthless enemies, match wits with Cleopatra, and solve the two-thousand-year-old mystery to prevent the most powerful treasure of the ancient world from falling into the wrong hands.

In this sequel to the New York Times bestselling Charlie Thorne and the Last Equation—which #1 New York Times bestselling author Chris Grabenstein called “a real page-burner”—Charlie searches for Charles Darwin’s hidden treasure in South America. Charlie Thorne is a genius. Charlie Thorne is a fugitive. Charlie Thorne isn’t even thirteen. After saving the world, Charlie is ready to take it easy in the Galapagos Islands. That is, until she’s approached by the mysterious Esmeralda Castle, who has a code she knows only Charlie can decipher. In 1835, Charles Darwin diverted his ship’s journey so he could spend ten months in South America on a secret solo expedition. When he returned, he carried a treasure that inspired both awe and terror in his crew. Afterward, it vanished, never to be seen again… But Darwin left a trail of clues behind for those brave and clever enough to search for it. Enter Charlie Thorne. In a daring adventure that takes her across South America, Charlie must crack Darwin’s 200-year-old clues to track down his mysterious discovery—and stay ahead of the formidable lineup of enemies who are hot on her tail. When an ancient hidden treasure is at stake, people will do anything to find it first. Charlie may be a genius, but is she smart enough to know who she can trust?

The first book in the thrilling time travel adventure trilogy from New York Times bestselling Charlie Thorne and Spy School author Stuart Gibbs. Before they were legends, they were friends. All for one and one for all! On a family trip to Paris, Greg Rich's parents disappear. They're not just missing from the city—they're missing from the century. So, Greg does what any other fourteen-year-old would do: He travels through time to rescue them. Greg soon finds out that his family history is tied to the legendary Three Musketeers. But when he meets them, they're his age, and they'll only live long enough to become true heroes if he can save them. To rescue his parents, Greg must assume the identity of a young Musketeer in training and unite Athos, Porthos, and Aramis—but a powerful enemy is doing everything possible to stop him. And don't miss Traitor's Chase and Double Cross, the next two books in Stuart Gibbs's thrilling Last Musketeer trilogy!

"Superspy middle schooler Ben Ripley races against time and across state lines - traveling by car, train, boat and plane - to track Murray Hill down before Ben's cyber enemies can find him"--

While visiting a ranch near Yellowstone National Park with his parents, Summer, and her parents, Teddy Fitzroy investigates the disappearances of bison and an irreplaceable necklace.

A debut novel already destined to be a book club favorite. “With its deft interweaving of psychological complexity and riveting narrative momentum, with its gorgeous prose and poetic justice, The Gravity of Birds is about sibling rivalry, tragedies, and resurrections. And it’s irresistibly exquisite” (San Francisco Chronicle). Forty-four years after the brilliant young painter, Thomas Bayber, first meets Alice and Natalie Kessler, Bayber unveils a never-before-seen work, Kessler Sisters—a provocative painting depicting the young Thomas, Alice, and Natalie. Bayber asks Dennis Finch, an art history professor, and Stephen Jameson, an eccentric young art authenticator, to sell the painting. But their task becomes more complicated when the artist requires that they first locate Alice and Natalie, who seem to have disappeared. Told in alternating chapters that weave revelations about the sisters’ past with clues Finch and Jameson discover in the present, this story sets three characters on a collision course with their histories, showing how families tear themselves apart and then try to bind themselves together again, not always creating the same fabric. The Gravity of Birds “combines the drama of warring sisters, the mystery of a missing painting, and the sorrow of lost love into a haunting elegy that will…leave you breathless” (Tiffany Baker, author of The Little Giant of Aberdeen County).