Everworld is a fantasy book series written by K.A. Applegate, known for its engaging storytelling and imaginative worlds. The series follows a group of teenagers who find themselves transported to a magical realm filled with mythical creatures, gods, and various cultures. In Everworld, the characters must navigate their new environment while facing challenges and adventures that test their friendships and personal growth. The series combines elements of fantasy and adventure, appealing to young adult readers who enjoy exploring alternate realities and the complexities of human relationships.