This chapter discusses literacy development by, first, outlining the nature of the reading of text in alphabetic languages. The process of acquiring word‐level reading skills is then described, including learning the alphabetic code, early decoding, and the development of word reading. In turn, processes associated with reading comprehension are discussed in regard to lower order skills, higher order skills, and construction–integration models. The chapter then considers the early development of reading‐related skills and discusses the behavior genetics of these skills and emergent literacy and its development. Issues related to the nature and identification of reading difficulties and disorders are discussed, and, finally, different approaches to reading instruction and the evidence in support of these approaches, with a focus on early instruction, are described.