(2) 4-6 Missing Link Trilogy series. Christie and his newfound family of humans, talking animals, and human-animal hybrids in Fourth World struggle to understand the purpose of a sinister invader; meanwhile, an interwoven narrative follows new characters Nessa and Farral, whose societies are threatened by war. As in the previous volumes, the characters are sympathetic, the narrative tension is thick, and the moral ambiguities are profound.

Reviewer: Vicky Smith | Horn Book Magazine Issue: January, 2008

(2) 4-6 Missing Link Trilogy series. Human-animal genetic manipulation is the motor that drives this gripping book in a promising science fiction trilogy. Christie, thirteen, and his physically awkward stepbrother, Danny, travel to Fourth World, Danny's mysterious mother's home in Scotland. The tale unfolds quickly as the stepbrothers, an angry homeless girl, a talking sheepdog, and a starling make their way across Britain, experiencing natural and human peril.

Reviewer: Vicky Smith | Horn Book Magazine Issue: May, 2005