Zilpha Keatley Snyder (May 11, 1927 October 8, 2014) was an American author of books for children and young adults. She was most famous for writing adventure stories and fantasies.
- The Velvet Room (1965)
- The Egypt Game (1968)
- The Witches of Worm (1972)
- The Stanley Family (1971 - 1989)
- Green-Sky Trilogy (1975 - 1977)
Tropes found in Zilpha Keatley Snyder's works include:
- Big Fancy House: Often slightly (or more than slightly) decrepit and filled with stories of better days. In Season of Ponies (1966) it's a huge, well-appointed but gloomy farmhouse. In The Changeling (1970) it is a burnt-out shell. In The Velvet Room (1965) it is simply boarded up and dusty save for one room, the library nicknamed in the title, although at the end of the story there are plans to reopen it as a museum.
- Elders: An old person (usually female, although in The Egypt Game it's a man) knows secrets and background information that they impart to the younger people, either during the action or at the very end of the tale.
- Maybe Magic, Maybe Mundane: Snyder often keeps you guessing if honest-to-God magic has happened, or serendipitous coincidence.
- Uptight Loves Wild or Manic Pixie Dream... Something: Many of her stories have intelligent, imaginative children in oppressive life circumstances. They encounter something or (usually) someone who is extremely unusual and possibly unearthly, who introduces them to amazing possibilities in themselves and in life. Often this only lasts over one summer, or comes and goes unexpectedly.