"Lug, the boy who'd rather paint cave walls, is back in a second adventure. With a fast-approaching glacier, Lug and his friends Stony and Echo are caught up in saving their clans from a frosty demise. On their first close-up view of the glacier, they discover and resuscitate a boy (Blast) frozen in ice. Blast encourages them to buy into his idea of bringing their two clans into his ice castle to protect them from the glacier, but what the friends find in the ice castle quickly shifts from intriguing to frightening. When Lug is thrown into the dungeon, he discovers other groups of people being held prisoner by Blast and his cronies. Can the three friends succeed in slowing the glacier, protecting their clans, and freeing the people and animals? Zeltser pairs friendship and climate change in this adventure of good versus evil, and heroes versus bullies. With short chapters, plenteous dialogue, and humorous illustrations, this is a good choice for reluctant readers or fans of the Ice Age animated movies."--Booklist.