Disaster! King Lion has lost his voice and cannot read the animals their bedtime story. Luckily, Preposterous Rhinoceros wants to give it a go... but how do you go about reading a book? Written by Tracy Gunaratnam, this educational Early Reader book is book band Turquoise (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.