Harleigh J. Weatherby IV leads a lonely existence in the vast Weatherby mansion under the watchful eye of his great aunt Adelaide -- until a mysterious girl named Allegra literally flies over the walls of Weatherby House and into his life.

Allegra's intense curiosity about Weatherby House forces Harleigh to think about things he's always ignored, including the long-lost treasure of the first Harleigh -- which someone is trying to steal.

When the four Stanley children meet Amanda, their new stepsister, they're amazed to learn that she studies witchcraft. They're stunned to see her dressed in a strange costume, carrying a pet crow and surrounded by a pile of books about the supernatural. It's not long before Amanda promises to give witchcraft lessons to David, Jamie and the twins. But that's when strange things start happening in their old house. David suspects Amanda of causing mischief, until they learn that the house really was haunted long ago.

Legend has it that a ghost cut the head off of a wooden cupid on the stairway. Has the ghost returned to strike again?

The first time Melanie Ross meets April Hall, she's not sure they have anything in common. But she soon discovers that they both love anything to do with ancient Egypt. When they stumble upon a deserted storage yard, Melanie and April decide it's the perfect spot for the Egypt Game. Before long there are six Egyptians, and they all meet to wear costumes, hold ceremonies, and work on their secret code. Everyone thinks it's just a game until strange things start happening. Has the Egypt Game gone too far?

From a three-time Newbery Honor author: Harry Houdini Marco had it hard enough as a normal clumsy twelve-year-old—but growing wings made it even worse.  Except for his unusual name, Harry Houdini Marco is unremarkable in every way. While his namesake was the greatest illusionist of all time, Harry can’t even catch a ball. He is on the verge of a long, boring summer—and he is dreading every moment of it. Then he meets a mysterious traveling salesman named Mr. Mazzeeck. But Mr. Mazzeeck is more than a traveling salesman, he’s a wizard—at least, he claims to be. Before he leaves town, Mr. Mazzeeck gives Harry a bottle of magical oil, saying that the potion will give him wings. And to Harry’s amazement, the oil works: He gets wings! Now he just has to figure out how to use them. This book features an extended biography of Zilpha Keatley Snyder.