What to read after One Small Step?

"It's 1969 and thirteen-year-old Scott MacLeod is doing all the normal activities that boys do -- and just happens to fly airplanes with his Air Force flight instructor father. When Scott manages to successfully crash-land a plane, he catches the eye of NASA, who recruits him for a top-secret space program that will send a test flight to the moon before the first lunar landing. The craft was originally supposed to be piloted by chimps, but when one of them is taken off the mission, they call on Scott to take his place. Soon Scott finds himself in the midst of grueling training for this mission -- and quickly realizes the chimps are much more clever and competent than their human counterparts give them credit for. But things are not quite adding up at the training facility. Could NASA be hiding a secret from the boy aviator and his crew of chimps? G-forces and government secrets collide as Scott sets out on his journey to the moon -- and goes on the adventure of a lifetime!"--Page 4 of cover