Leo, Fiz and Raj make up the Detective Club. They love solving mysteries and catching baddies! When an ancient chest is stolen, will they be able to follow the clues to catch the culprit Written by Elizabeth Dale, this educational Early Reader book is book band White (aimed at 6-7 years, Year 2-3). The colour grading system is recognised by the Institute of Education which reflects the reading difficulty. The book content, language style, phonics and layout are taken into account to determine this.