An alphabet book, also known as an ABC book, is a children's book intended to teach the 26 letters of the English alphabet. There are various synonyms for alphabet book, including ABC primer, alphabet primer, alphabet reader, and ABC picture book. These books usually feature illustrations or photographs of objects and animals that correspond to each letter of the alphabet. In addition to teaching children the alphabet, these books often have a secondary educational purpose, such as introducing new vocabulary or concepts. Many alphabet books also incorporate rhyming, alliteration, and other literary techniques to make the learning process fun and engaging for young readers.