Jolly Phonics Paperback Readers, Level 1 Nonfiction is the first of four levels of decodable books, providing the best start for children just starting to read. With three lively series in each level, children are able to practice their phonic skills while developing key reading skills Level 1 features words that are spelled regularly, and can be sounded out with the 42 letter sounds first taught in Jolly Phonics.