When Kendra and Seth go to stay at their grandparents' estate, they discover that it is a sanctuary for magical creatures and that a battle between good and evil is looming.

From Duluth, Georgia, fourteen-year-old Jimmy Fincher sets off on a quest that takes him across the country and to other, sometimes terrifying, worlds, armed with a powerful gift and a mission: to prevent the evil Stompers from destroying Earth.

Having expanded their treehouse to an astonishing thirty-nine stories, Andy and Terry describe the invention of their "Once-Upon-a-Time machine," which they have designed to write and illustrate their stories for them.

Having discovered that his destiny is tied to that of Farworld, Marcus, despite his growing power over water, struggles with physical pain and inner doubts as, with the help of his companions, he tries to complete the quest to find the other elementals that will help destroy the evil force of the Dark Circle.

Bestselling author David Rain returns to help Lucy and the Pennykettle dragons try to find and destroy a drop of dark fire before it is discovered and used to birth a darkling, while in the Arctic, enshrouded in mist, hide dragons that have at last returned to Earth.

When Ben Ravenspell's familiar, a magical pet mouse named Amber, turns him into a mouse, they find themselves doing battle against an evil archenemy, the outcome of which will determine the fate of the world.

Andy and Terry work on their next book in their elaborate treehouse, trying to ignore distractions such as ice-skating penguins and an Automatic Tattoo Machine.

"Andy and Terry live in a 78-story treehouse. (It used to be a 65-story treehouse, but they just keep building more levels!) It has a drive-through car wash, a courtroom with a robot judge called Edward Gavelhead, a scribbletorium, ... and an open-air movie theater with a super-giant screen... which is a very useful thing to have now that Terry's going to be a big-shot movie star! After Andy gets cut out of the movie, he and Terry have a huge fight...

Andy and Terry travel through time trying to save their treehouse from highly talented, angry ants and Inspector Bubblewrap the building inspector while rushing to meet their publisher's deadline.

"When Andy develops a severe toothache that prevents him from writing new jokes for their book, Terry uses their fantastical treehouse's money-making machine funds to purchase a Joke Writer 2000, with unexpected results." --