This Turquoise Storybook will help children to learn to read using Ruth Miskin's highly effective Superphonics method. There are four levels in the Storybook series - Blue (the easiest), Green, Purple and Turquoise (the hardest). Each level is linked to one of the core Superphonics books. Turquoise Storybooks practise the sounds taught in Superphonics Book 5.