"Magical, terrifying, and full of heart. Open these pages, and ride true."-Kathi Appelt, Newbery Honor-winning author of The True Blue Scouts of Sugar Man Swamp"A remarkable book. Astonishing!"-Michael Morpurgo, author of War Horse There are winged horses that live in the mirrors of Briar Hill hospital—the mirrors that reflect the elegant rooms once home to a princess, now filled with sick children. Only Emmaline can see the creatures. It is her secret.One morning, Emmaline climbs over the wall of the hospital's abandoned gardens and discovers something incredible: a white horse with a broken wing has left the mirror-world and entered her own. The horse, named Foxfire, is hiding from a dark and sinister force—a Black Horse who hunts by colorless moonlight. If Emmaline is to keep him from finding her new friend, she must surround Foxfire with treasures of brilliant shades. But where can Emmaline find color in a world of gray?"Emmaline's narration is unreliable, flawlessly childlike, and deeply honest; her faith in magic brings her solace and, possibly, healing. The magical realism is reminiscent of the Chronicles of Narnia, Elizabeth Goudge, or a child's version of Life of Pi...Readers will love this to pieces." —Kirkus Reviews, Starred review"Endearing characters, metaphors for life and death, and a slow revelation of the horrors of war give this slim novel a surprising amount of heft."—Booklist, Starred reviewFrom the Hardcover edition.