"Meet Hopper, Eni, and Josh as they write their first line of code, and join them for their final showdown with Dr. One-Zero."--Slipcase.

Just in time for the 10th anniversary of Between Shades of Gray, Ruta Sepetys's award-winning debut novel, and inspiration for the major motion picture Ashes in

Join George and Annie as they explore the galaxy in this cosmic adventure series from acclaimed scientist Stephen Hawking and his daughter Lucy Hawking. George�

George travels to the future in the epic conclusion of the George’s Secret Key series from Lucy Hawking. When George finds a way to escape the spacecraft Arte

"Discusses different methods for breaking secret codes"--Provided by publisher.