A mean bear has stolen all the bikes before the race. The Dog Detectives must find the bikes and stop the bully from cheating his way to the finish line! Written by Zoe Lumsden, this educational Early Reader book is book band Purple (aimed at 6-7 years, Year 2). 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.