Part of a winter animals series by a prolific children’s author, this combines historical fiction and fantasy in an utterly charming way. Cassie is a middle child who always feels left out of her big brother’s games, but befriending a fox who lives on some scrubby ground near her London flat gives her a chance for adventures of her own. She names the fox cub Frost and regularly feeds her. One winter night, Frost leads Cassie down the road – and back in time to the Frost Fair of 1683 on the frozen Thames. I rarely read middle-grade fiction, but this was well worth making an exception for. It’s probably intended for ages eight to 12, yet I enjoyed it as a 36-year-old childless woman. My library copy smelled like strawberry lip gloss, which was somehow just right.