★ "[B]rimful of intrigue, plucky wannabe adventurers, and some suspiciously artful iron....Observant readers will delight in piecing together the clues to puzzle out the knots alongside the Knot....A fascinating, intricate tale of friendship and rescue."—Kirkus, STARRED review
★ "[A] truly twisty brain-teaser filled with puzzles, misdirection, and adventure, all with just the right balance of emotional weight that is pitch-perfect for a middle-grade audience....Milford’s Nagspeake stories are always a treat, but this one, with its tight, clever plotting; heartening emotional growth, and dynamic setting, shines extra brightly."—Booklist, STARRED review
★ "This is a perfectly plotted and well-told mystery, and the fascinating settings and characters make it unique.... Readers will delight in this old-fashioned mystery, made fresh with intriguing places and people."—School Library Journal, STARRED Review
"[A] worthy addition to [Milford's] already established setting of Greenglass House that will also appeal to new readers....Milford’s descriptive writing is a treat."—The Bulletin of the Center for Children's Books
