Harry finds a viking helmet in his grandparent's garden. When he puts it on...whoosh! He is transported back to Viking times. Written by Cath Jones, 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.