Laddertop

An original science fiction tale by the bestselling author of Ender's Game and his daughter

Twenty-five years ago, the alien Givers came to Earth and bestowed upon the human race the greatest technology ever seen—four giant towers known as Ladders that rise thirty-six thousand miles and culminate in space stations that power the entire planet. Then, for reasons unknown, the Givers disappeared. Due to the unique alien construction of the