"Twelve-year-old William uses the magic token to return, through the toy castle in his attic, to the medieval land of Sir Simon, which is now menaced by a skeleton ship bearing a plague of ravenous rats." -- from publisher.

For young Measle Stubbs, surviving a stay in a haunted castle means confronting pictures that come to life, a murderous suit of armor, and a jellybean-loving wrathmonk.

A gift of a toy castle, complete with silver knight, introduces William to an adventure involving magic and a personal quest.

Mrs. Worm and Gloomsburg castle are taken over by ghosts.

The fifth and final book in Jessica Day George's magical bestselling series, where Celie and her family set sea on a grand ship made in the likeness of their beloved Castle!
There is never a dull moment for Celie and her family in Castle Glower—even when they're not in the Castle itself! After traveling to the seaside kingdom of Lilah's betrothed prince, Lulath, Celie and her companions are busy training griffins, enjoying wedding...

What will Wednesday bring in the second book in this charming New York Times bestselling middle-grade fantasy series from Jessica Day George?
When her brother Rolf dares her to catch magical Castle Glower creating a new room, Princess Celie takes the challenge! No one knows the Castle better than she does. But as usual, the Castle has ideas of its own . . .
Celie finds the new room, and inside it is hidden a giant egg. It looks...

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 knowthat 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....

"Castle Glower's towers have transported Princess Celie, her siblings, and her pet griffin, Rufus, to an unknown land. As they set out on a dangerous adventure to discover their whereabouts, they find an entire lost people, divided by the wishes of two wizards in a centuries-old quarrel over their beloved home--Castle Glower"--

Count Harken, who returns to get revenge on the Red King's heirs, begins with Charlie Bone's family, and when Charlie goes on a quest to save his ancestor with his best friend's dog, Runner Bean, the dog gets trapped in Badlock with everybody else.