Icefire is a 2003 children's fantasy novel by English author Chris d'Lacey.
Dr. Bergstrom gives David an assignment on dragons and says the contest prize is a trip to the Arctic.
Liz saves Gruffen from breaking just in time and shows David what is in the box—a snowball.
Beth L. Meister, writing for School Library Journal, compared Icefire to early books in the series, noting that the novel "offers a darker and more mature story" than The Fire Within.
Further, Meister found that "Liz's clay dragons develop a greater degree of realism within the story, and their background is further explored".