Seventh Grade vs. the Galaxy

PSS 118 is just your typical school—except that it's a rickety old spaceship orbiting Ganymede, a moon of Jupiter. Jack's dad used to be the science teacher, until he got fired for tinkering with the ship. Now Jack just wants to get through the last day of school without anything else going wrong.

But when the school is mysteriously attacked, Jack discovers that his dad has built humanity's first light-speed engine—and given Jack control of it. To save the ship, ...