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.

Magically-gifted Charlie Bone, accompanied by his best friend's dog, Runner Bean, comes to the rescue when the enchanter Count Harken takes revenge on the Red King's heirs by kidnapping and imprisoning Charlie's ancestors in the dark, forbidding land of Badlock.

Lord Dougal asks the detective Tweedy and his assistant Rollo to solve the mystery of the ghost haunting Dougal Castle.

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.

"In David Housewright's next hardboiled mystery Something Wicked, Rushmore McKenzie, who promised to retire after his last nearly-fatal case, gets talked into doing an old friend a favor involving a castle, a family fighting over an inheritance, and at least one mysterious death. Rushmore McKenzie was a detective with the St. Paul, Minnesota PD until unlikely events made him first a millionaire and then a retiree. Since then, he's been an occasional...

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.

"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...