11 books in series

Everworld

Everworld is a 11-book series with 11 primary works first released in 1999 with contributions by Katherine Applegate and K. A. Applegate.

Land of Loss
Enter the Enchanted
Realm of the reaper
Discover the Destroyer
Fear the Fantastic
Gateway to the Gods
Brave the Betrayal
Inside the Illusion
Everworld
Mystify the Magician
Entertain the End