"Beyonders" is a fantasy book series written by Brandon Mull. It follows the adventures of two main characters, Jason and Rachel, who are transported to a magical world called Lyrian. In this realm, they encounter various creatures and face challenges as they seek to fulfill a prophecy. The series explores themes of bravery, friendship, and the struggle between good and evil. As Jason and Rachel navigate their new surroundings, they learn about their own strengths and the importance of teamwork. The books are aimed at middle-grade readers and are known for their imaginative storytelling and engaging characters.