Deep dyslexia – a variety of reading disorder that can result from brain injury in a previously literate adult – was the subject of more intensive individual case studies than any other syndrome in neurolinguistics and neuropsychology. Originally published in 1987, this book, now in its second edition, was acknowledged as the major work in the field at the time. It demonstrates that, when guided by an explicit theoretical framework, such case studies can result in both precise understanding of the patients’ deficits and striking insight into the nature of normal reading processes. This revised edition includes a new chapter, reviewing work done since the first edition appeared. Today it can be read in its historical context.