Wilderness by Roddy Doyle
A novel of mothers lost and found, Wilderness is part roaring adventure, part family drama-with a charm that's all Roddy Doyle's. While Tom and Johnny are on a husky safari in Finland, their half-sister Gemma stays behind to face the mother who abandoned her. But Tom and Johnny are too caught up in their adventure to think of home-until they find themselves lost in the snow, in a desperate struggle for survival . . .