Game Series

• The Egypt Game (1967)
• The Gypsy Game (1997)
• The Gypsy Game Teacher's Guide (1998)

Stanley Family Series

• The Headless Cupid (1971)
• The Famous Stanley Kidnapping Case (1979) ISBN 0-689-30728-4
• Blair's Nightmare (1984)
• Janie's Private Eyes (1989)

Green Sky Series

• Below the Root (1975)
• And All Between (1976)
• Until the Celebration (1977)

Castle Court Series

• The Box and the Bone (1995)
• The Diamond War (1995)
• Ghost Invasion (1995)
• Secret Weapons (1995)
• Alexis Danger (2001)

Gib Series

• Gib Rides Home (1998)
• Gib and the Gray Ghost (2000)

Novels

• Season of Ponies (1964)
• The Velvet Room (1965)
• Zilpha Keatley Snyder (1966)
• Black and Blue Magic (1967)
• Eyes in the Fishbowl (1968)
• Today Is Saturday (1969)
• The Changeling (1970)
• The Witches of Worm (1972)
• The Princess and the Giants (1973)
• The Truth About Stone Hollow (1974) (a.k.a. The Ghosts of Stone Hollow)
• Witch in the Family (1977)
• Heirs of Darkness (1978)
• A Fabulous Creature (1981)
• The Birds of Summer (1983)
• The Changing Maze (1983)
• And Condors Danced (1987)
• Song of the Gargoyle (1990)
• Libby on Wednesday (1991)
• Fool's Gold (1993)
• Cat Running (1994)
• The Trespassers (1995)
• The Runaways (1999)
• Spyhole Secrets (2001)
• The Ghosts of Rathburn Park (2002)
• The Unseen (2004)
• The Magic Nation Thing (2005)
• The Treasures Of Weatherby (2006)
• The Bronze Pen (2008)
• William S and the Great Escape (2009)

• Snyder was heavily involved in Below the Root, a 1984 computer game that is set in the Green Sky universe after the events of Until the Celebration. She worked with programmer Dale Disharoon on several aspects of the game, including the map and characters.

1. Instruction manual for Below the Root