Fourteen-year-old Henry, wishing to honor his brother Franklin's dying wish, sets out to hike Maine's Mount Katahdin with his best friend and dog. But fate adds another companion--the Cambodian refugee accused of fatally injuring Franklin--and reveals troubles that predate the accident.

Twelve-year-old Addie tries to cope with her mother's erratic behavior and being separated from her beloved stepfather and half-sisters when she and her mother go to live in a small trailer by the railroad tracks on the outskirts of Schenectady, New York.

While working at pleasant but mundane summer jobs in San Francisco, fifteen-year-old twins, Sophie and Josh, suddenly find themselves caught up in the deadly, centuries-old struggle between rival alchemists, Nicholas Flamel and John Dee, over the possession of an ancient and powerful book holding the secret formulas for alchemy and everlasting life.