This Very Short Introduction provides a simplified overview of dyslexia research, based on the testimony of people who have it. It begins by explaining how children learn to read and write, the cognitive demands of this process, and the brain processes involved, evaluating the teaching approaches that yield the best results. Considering the genetic and environmental factors and potential causes of dyslexia, the book explains how studies comparing different languages ​​have documented the prevalence of dyslexia in these languages. By discussing the various brain-scanning techniques that have been used to determine whether the brains of people with dyslexia differ in structure or function from those of normal people, the book then evaluates the various strategies and interventions that can currently help people with dyslexia.