Grey Griffins is a children's novel series written by the American authors Derek Benz and J. S. Lewis in collaboration.

[1] The first trilogy in the series was published by Orchard Books, an imprint of Scholastic Inc.

The authors signed with Little, Brown Books for Young Readers for the second trilogy.

The Grey Griffins series follows the story of four close friends (Max, Ernie, Natalia and Harley) who find the small town they have lived in all their lives is ground zero for an invasion of the darkest and most dangerous sort of magic.