A. M. Arkin 
Sleep Talking [PDF ebook] 
Psychology and Psychophysiology

First published in 1982. This book offers virtually everything that is publicly known about sleep-talking, with the greatest amount and most important of this information coming from the author’s own research. The work is thorough, careful, and thoughtful. It is that rare product that says just about all that can be said on a subject. In short, it is now the “authoritative work” on sleep talking, and it is likely to remain such for many years.