Zilpha Keatley Snyder

Hallie Meredith is angry at God and feeling sorry for herself. Her beloved father died in a car accident, and her whole life has turned upside down. Her mother has had to find a job, and they've moved to a cramped apartment in an old mansion, away from Hallie's old friends and her school. Looking for somewhere--anywhere--to hide from her lousy life, Hallie discovers the old mansion's mysterious attic, and a secret window where she can spy straight...

Twelve-year-old Alexandra stumbles upon the key to a hidden world—but is it a gift, or a nightmare?
Twelve-year-old Alexandra Hobson feels ignored and unloved in her family of annoying, self-absorbed overachievers. One day in the woods she hears a shot, and is horrified to see a large, beautiful bird fall to the ground. She takes the injured egret home, hiding it in the basement behind the furnace, where it joins the other wounded...

Cats. Jessica's never liked them. Especially not a skinny, ugly kitten that looks like a worm. Worm. Jessica wishes she'd never brought Worm home with her, because now he's making her do terrible things. She's sure she isn't imagining the evil voice coming from the cat, telling her to play mean tricks on people. But how can she explain what's happening? Witches. Jessica has read enough books to know that Worm must be a witch's cat. He's cast a spell...

Six imaginative schoolmates embark on a game in which they pretend to be Gypsies, but when one of the boys runs away and takes up with a group of homeless people, the game threatens to become all too real.

Eleven-year-old David is about to meet his new stepsister, Amanda, who is only one year older than he is. Amanda arrives at their big old house wearing a huge tattered shawl and carrying a sharp-eyed crow in a cage. She is hardly what David expects. Before long, she introduces David to a strange world of witchcraft and the occult. At first, spells and potions are fun. He enjoys the spooky chants and smoky seances. Even his younger brother and sisters...