On a mission for Merlin, Jack and Annie travel back in time to the Coney Island boardwalk in New York to discover a special secret held by famous illusionist Harry Houdini.

When Charmain is asked to housesit for Great Uncle William, the Royal Wizard of Norland, she is ecstatic to get away from her parents, but finds that his house is much more than it seems.

Jack and Annie visit the Paris World's Fair of 1889 in an effort to protect four scientific pioneers from an evil sorcerer.

"Two enemy witches must enter into a deadly alliance to take down a tyrant who threatens both their worlds-with unpredictable results"--

Searching for the father she has never met in an alternate-world 1983 London, Susan is drawn into an extended family of magical, left-handed, fighting booksellers who police intruders from the mythical Old World of England.

On Christmas Eve, Jack and Annie's tree house transports them to King Arthur's castle at Camelot, where they undertake a quest to the castle of the Otherworld.

Jack and Annie travel to a monastery in the Swiss Alps where, with the help of St. Bernard dogs and magic, they seek the second of four special objects necessary to break the spell on the wizard Merlin's beloved penguin, Penny.

The magic treehouse whisks Jack and Annie back to the days of deserted islands, secret maps, hidden gold, and nasty pirates.

After their father's research experiment at the British Museum unleashes the Egyptian god Set, Carter and Sadie Kane embark on a dangerous journey across the globe--a quest which brings them ever closer to the truth about their family, and their links to a secret order that has existed since the time of the pharaohs.

In 1987, when sixteen-year-old Mayhem and her mother leave her abusive stepfather and return to Santa Maria, California, May learns she is heir to magical power, destined to stop evildoers.