The first book I ever properly owned – pored over, slept with, inscribed – was an elaborately illustrated hardback copy of J.R.R. Tolkien’s The Hobbit. One can imagine the producers of the attractively packaged Tollins: Explosive Tales for Children hoping it might assume similar significance for a contemporary seven-year-old boy. Conn Iggulden’s secret and quirky world of the Tollins involves old, greybearded men, intricate maps and plenty of adventures and derring-do by the book’s unlikely hero, Sparkler.