John Yunker writes plays, short stories, and novels. He is the author of the novel The Tourist Trail; editor of the Among Animals fiction series and a nonfiction anthology, Writing for Animals; and his plays have been produced or staged at such venues as the Oregon Contemporary Theatre, the Source Festival, and more. His teleplay Sanctuary was performed at the 2017 Compassion Arts Festival in New York, and his short stories have been published in many literary journals.

Raymond and Yunker live in Ashland, Oregon. Devils Island is the debut collaboration by the writing duo Midge Raymond and John Yunker.

Midge Raymond is the author of the novel My Last Continent and the award-winning short-story collection Forgetting English. Her writing has appeared in a number of literary publications, and she has taught writing at Boston University and at many writer's organizations and conferences around the world. She earned a certificate in private investigation from the University of Washington.