"Worldbuilding is vivid, from Caligo's library, with bear-sized batlike creatures that convey visitors to the multistoried stacks, to Maris, where the inhabitants live on docks suspended above the sea. . . . An effective and exciting conclusion."--Kirkus Reviews
"Readers who enjoy a fast plot as well as unique, quickly limned worlds will devour this one."--Booklist
"One of the joys of fantasy is world-building, and the descriptions of the realms of Caligo, Maris, Vinea, and Somni are concise and vivid but never distract from the action. . . . Crowder deftly conveys the stakes of Griffin's and Fi's struggles by depicting the effects of oppression and resistance on their families. Best enjoyed directly after finishing its predecessor, this title will delight readers who yearn for escape, new worlds, and powerful main characters."--School Library Journal