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About The Book

Perfect for fans of Doll Bones and Coraline, this eerie, spine-tingling fantasy follows a girl who discovers two otherworldly children and finds herself trapped in an ancient bargain that threatens to destroy them all.

It is the autumn of 1160, and twelve-year-old Agnes is helping with the harvest when she hears a frightened voice calling from the nearby woods. When she goes to investigate, Agnes can’t believe what she sees. There, at the bottom of the deep wolf traps, are two children. They are shouting in a language no one understands—and their skin is green.

Agnes soon discovers that these are no ordinary children; in fact, they aren’t even human. They are of the Fair Folk, and they are here to take Agnes home to their world. Trusting that the Fair Folk cannot lie, Agnes agrees to venture underground. But she soon learns just how dangerous their world is—and what it will take to break the ancient bargain meant to keep her there.

About The Author

Photo (c) by author

J. Anderson Coats has master’s degrees in history and library science and has published short stories in numerous literary magazines and anthologies. She is the author of the acclaimed novels The Wicked and the JustThe Many Reflections of Miss Jane DemingR Is for RebelThe Green Children of Woolpit, and The Night Ride, as well as A Season Most Unfair. She lives with her family in Washington State. Visit her at

Product Details

  • Publisher: Atheneum Books for Young Readers (September 10, 2019)
  • Length: 256 pages
  • ISBN13: 9781534427921
  • Grades: 5 and up
  • Ages: 10 - 99
  • Lexile ® 780L The Lexile reading levels have been certified by the Lexile developer, MetaMetrics®

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Raves and Reviews

“Agnes’s voice is precise, distinctive, and very beautiful, and her penchant for dreaminess underlines her difference from the other villagers—a quality that makes her vulnerable to Senna’s enticing lies. Senna is a sharp, survivalist foil for dreamy, good-hearted Agnes, and her history as a victim of brutal imperial conquest garners readerly sympathy even as she attempts to assume Agnes’ identity. . . . Agnes’ secure love for her family and her belief in the life-shaping power of stories bind this bittersweet book together. As Agnes says, ‘There should be more stories where girls help one another.’”


“There are multiple plot twists, alternating narrative voices (Senna, the girl Agnes replaces in the underground fairy world, has her own tale to tell), and frequent surprises due to the shifting illusions devised by the fairy folk. Through it all, Coats’s story maintains its strong central theme: Agnes’s determination to become the hero of a story—one that turns out to feature two girls helping each other.”

– The Horn Book

“Fraught with excitement and peril. Coats skillfully weaves in facts about the Fair Folk, Agnes’s parents, and the coming of the Romans to Britain in this tale that hearkens back to a medieval story first recorded by monks."

– School Library Journal

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More books from this author: J. Anderson Coats