The Alden children have another mystery to solve when they visit a castle and must figure out which of the guests has stolen the Stradivarius violin.

After discovering a giant egg in the magical Castle Glower, Princess Celie agrees to care for the egg and what creature it hatches.

In a witch's house, nothing is as it seems. When a scarecrow climbs over the garden wall, delivering twelve-year-old orphan Zita Brydgeborn a letter saying she has inherited a distant castle, she jumps at the chance of adventure. But little does she know that she is about to be thrust into a centuries-old battle between good and evil. Blackbird Castle was once home to a powerful dynasty of witches, all of them now dead under mysterious circumstances....

Jack and Annie travel back in time to medieval England for an adventure inside a storybook castle, from feasting hall to dreadful dungeon. With humor and magic, this critically acclaimed author brings history to life in this First Stepping Stone book. Illustrated.

Charlie and his magically gifted friends and relatives work together to rescue Billy Raven, a young orphan, from a mysterious and dangerous couple who have adopted him.

Eight-year-old Jack and his younger sister Annie use the magic treehouse to travel back to the Middle Ages, where they explore a castle and are helped by a mysterious knight.

The 1934 journal of seventeen-year-old Cassandra Mortmain reveals her perspective on six stormy months in the eccentric and poverty-stricken life of her family in a ruined Suffolk castle.