Coren's first book outside of professional psychology circles was 1993's "The Left-Hander Syndrome: the causes and consequences of left-handedness", which presented data on the significant challenges faced by left-handed people in society. His research was discussed widely, and has been printed and discussed in a number of professional journals such as "Psychiatric Times". His next book was "Sleep Thieves", the result of his studies into sleep and the lack of it. The book examined how the reduction of sleeping time in modern society has created problems of sleep deprivation for many people.