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.

When her first two attempts to help a monster with his embarassing problem go awry, Zoey and Sassafras will have to find a solution quick if Gorp is to make it to the annual monster ball.

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.

Abby and Jonah find themselves in the story of the Snow Queen, who chose power over family and friendship, and, with help of a talking reindeer and a strange girl, Abby works to free the children the Queen has under her spell.

The evil wizard Maldred has stolen the gold and silver keys which will allow him to release the Naga, the powerful earthquake dragon at the center of the earth--so Drake and several of the other Dragon Masters travel to the Naga's Temple in the Dragon Islands, to try and stop Maldred, and prevent him and the earthquake dragon from destroying the kingdom.

The members of the Lambchop family react differently when a boistrous genie grants their wishes for fame, power, and the ability to fly.

Having taken the silver key, the evil wizard Maldred is after the gold key, which is protected by the Gold Dragon and her Dragon Master, Darma, but by the time Drake and Rori get there, Eko and her Thunder Dragon have seized the gold key--so together the three dragon masters, follow her through the portal to Maldred's tower, but without their dragons will they be able to stop Maldred and his deluded helper, or even save themselves?

Jack and Annie search for the fourth secret of greatness for Merlin the Magician in Mexico City at the 1970 World Cup Games where they hope to learn something new from soccer player great Pele.

After discovering that injured animals come to the barn in her backyard for help, it is up to Zoey and her cat Sassafras to help new arrival Marshmallow, a sick baby dragon.

In this You Choose adventure, the miller's daughter has to turn seaweed into oxygen in a bubble city on a polluted Earth, a middle school student has to complete binders of math problems, and a lonely magical hermit's offers of assistance stem from his desire for friendship--the reader chooses which plot to pursue.