In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.

Eleven-year-old Princess Celie lives with her parents, the king and queen, and her brothers and sister at Castle Glower, which adds rooms or stairways or secret passageways most every Tuesday, and when the king and queen are ambushed while travelling, it is up to Celie--the castle's favorite--with her secret knowledge of its never-ending twists and turns, to protect their home and save their kingdom.

"In 1865, orphaned Daisy Francois takes a housemaid position and finds that the eccentric Gothic authoress inside hides a story more harrowing than those in her novels. Centuries later, Cleo Clemmons uncovers an age-old mystery, and the dust of the old castle's curse threatens to rise again, this time leaving no one alive to tell its sordid tale"--

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

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.

"Rodeo Drive bridalwear designer Rayne McGrath expected her thirtieth birthday to start with a power lunch and end with champagne, lobster, and a diamond engagement ring from her fiancé. Instead, flat-broke and busted, she's on a plane to Ireland where she discovers that she's inherited a run-down family castle. Uncle Nevin's will contains a few caveats--for example, if Rayne doesn't turn McGrath Castle around within a year, the entire village will...