An original science fiction tale by the bestselling author of Ender’s Video game and his little girl

Twenty-five years ago, the alien Givers found Earth and bestowed upon the people the greatest technology ever seen-four huge towers known as Ladders that rise thirty-six thousand kilometers and culminate in space stations that power the entire planet. After that, for reasons unidentified, the Givers vanished. Due to the exclusive alien construction from the Laddertop space channels, only a skilled crew of kids can perform the maintenance essential to keep the channels up and running.

Back on the planet, competition is fierce to enter Laddertop Academy. It is an honor few students will achieve. Best friends Robbi and Azure, two eleven-year-old girls who are applicants for the academy, will become entangled inside a dangerous mystery that might help them solve the riddle of the Givers-if it doesn’t destroy the planet earth first.