In this book by Frank Asch, Alex Archer’s latest invention, the Anti-Gravitron, is finally ready. Soon, Alex will be able to master gravity and make it do anything he wants. It’s the crowning touch to his cardboard masterpiece of a spaceship. He and his new copilot, Zoe Breen, are about to say hello to Jupiter — and goodbye to Alex’s rotten little brother Jonathan! Or so Alex thinks … Launch date: February 2007.