A mischievous elf has found its way into the pages of your book in this festive follow-up to There's a Monster in Your Book, There's a Dragon in Your Book, and There's an Alien in Your Book. In the run up to Christmas, children and adults alike will love interacting with the loveable, mischievous little elf as it takes them through the all-important Nice List Test, to discover if they've earned their Christmas presents. But be careful not to let it catch you out! This cheeky elf has a few naughty tricks up its sleeve . . .