Alphabet Series are designed who are ready to tackle more advanced concepts. New readers feel empowered because they can sound-out unfamiliar words without guessing and steadily build their reading skills. These books are completely “decodable” meaning that they use simple words and only short vowel sounds as the first stepping stones into reading. Decodable readers series slowly progress into more complex reading concepts moving from simple one-syllable words (fan) to multisyllabic words (fantastic).