Ike Jordan dreams of gravity's polarity. He dreams of himself upon the field of the earth, staring into the darkening sky, arms outstretched. His father's voice whispers, "Gravity can push you into the sky as easily as pull you toward the earth." Fully awake and inducted into his father's work with secret gravity technology -- fantastical as it is -- Ike's worldview, emotions, and relationships turn upside down. Caught up in his father's secret, he can't tell Christine Wall about his nights cruising among the stars, or tell his best friend Charlie about chasing the sun over the horizon. He...

Babbs and her twin brother Boston travel the universe through Doors, with a capital D. They can step through an intergalactic Door and come out anywhere on any planet. The Doors have always been exciting for the twins, until it all goes wrong. Now their grandmother has disappeared through the Doors, they've accidentally unleashed the dreaded fearmonger monster on the earth, and they must fix everything while keeping their adventures secret from the powerful, intergalactic Doorkeepers-the Order of the Porters. The twins find help from Friz, a six-legged alien who looks strikingly like a cocker...