Reading and writing skills were once confined to only a few people. Today, a person facing problems with acquiring literacy skills will run the risk of being excluded from fully participating in society. New information tends to imply even more demands on mastering reading and writing than ever before. Dyslexia was used early as a descriptive term for characterising problems of reading and writing. Since the introduction of the term, research has made impressive progress and interdisciplinary fields have been created including social studies, behavioural studies, biology, education and remediation. Above all, dyslexia research has taken a step from being descriptive to suggesting theoretical models for explaining the empirical phenomena observed. This book presents contributions from some of the world leading researchers on these issues in honour of one of the main scholars in the field, Professor Ingvar Lundberg.