58 books • 13 series
Book #1: The Diamond War
Book #2: The Box and the Bone
Book #3: Ghost Invasion
Book #4: Secret Weapons
Book #1: A Fabulous Creature
Book #1: Gib Rides Home
Book #2: Gib and the Gray Ghost
Book #1: Below the Root
Book #2: And All Between
Book #3: Until the Celebration
Book #1: The Headless Cupid
Book #2: The Famous Stanley Kidnapping Case
Book #3: Blair's Nightmare
Book #1: The Zilpha Keatley Snyder Treasury Volume One
Book #2: The Zilpha Keatley Snyder Treasury Volume Two