The Great Ice EngineBook - 2015
When Kristoff and the ice harvesters challenge Oaken and his new invention to a friendly contest, Oaken, Elsa, and Anna becomes embroiled in a mystery involving a missing ice harvesting machine.
Publisher: New York : Random House, 
Characteristics: 123 pages : illustrations ; 20 cm.
Alternative Title: Frozen (Motion picture : 2013 : Buck and Lee)