This book systematically examines how learning to read occurs in diverse languages, and in so doing, explores how literacy is learned in a second language by learners who have achieved at least basic reading skills in their first language. As a consequence of rapid globalization, such learners are a large and growing segment of the school population worldwide, and an increasing number of schools are challenged by learners from a wide variety of languages, and with distinct prior literacy experiences. To succeed academically these learners must develop second-language literacy skills, yet little is known about the ways in which they learn to read in their first languages, and even less about how the specific nature and level of their first-language literacy affects second-language reading development.