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.

When the dangerous ancient wizard Arkwright escapes the dungeon and goes missing within the Castle, Princess Celie must find the wizard and save her family.

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.

While visiting Wallis's castle, Dink and his friends investigate strange noises that lead them to a dangerous secret.

As a page in his uncle's castle in thirteenth-century England, eleven-year-old Tobias records in his journal his experiences learning how to hunt, play games of skill, and behave in noble society. Includes notes on noblemen, castles, and feudalism.

When Sand, a blacksmith's apprentice, wakes up in a broken castle, he must find a way to put it back together.

When their father is kidnapped and danger looms, the Strega-Borgia children, their mysterious new nanny, and a giant tarantula use magic and actual trips through the Internet to bring peace to their Scottish castle.

"Princess Imogen of Goslind has lived a sheltered life for three years at the boarded-up castle--she and the rest of its inhabitants safe from the bloody mori roja plague that's ravaged the kingdom. But Princess Imogen has a secret, and as King Stuart descends further into madness, it's at great risk of being revealed. Rations dwindle each day, and unhappy murmurings threaten to crack the facade of the years-long charade being played within the castle...

"Twelve-year-old Olia knows a thing or two about secrets. Her parents are the caretakers of Castle Mila, a soaring palace with golden domes, lush gardens, and countless rooms. Literally countless rooms. There are rooms that appear and disappear, and rooms that have been hiding themselves for centuries. The only person who can access them is Olia. She has a special bond with the castle, and it seems to trust her with its secrets. But then a violent...

Twelve-year-old Spade is a grave thief that gets caught up in a royal heist. long the way, he meets Ember, the queen's niece, and together they race to solve the mystery of the legendary Deepstones and their connection to the Woegon, the queen, a missing king and the mysterious pebble Spade finds in the Wyndhail cemetery.