Jaz is a rabbit, but at night, he is a robber rabbit! Jaz wants some carrots, but are his eyes bigger than his belly Written by Alice Hemming, this educational Early Reader book is book band Yellow (aimed at 5-6 years, Year 1). 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.