There are few decent books available about Rolex watches. Therefore, Dowling and Hess' massive tome on the subject is an extremely welcome addition to the subject. Their book is definitely well-researched, producing what is currently the definitive book on Rolex. Brief but informative chapters about some of the most recognizable Rolex designs (e.g., Explorer, Submariner, Daytona, OysterQuartz...) are augmented by beautiful color reproductions of the models they discuss. Furthermore, the authors provide very informative chapters regarding the Perpetual movement, chronometers, and the history of the company. Simply stated, this is THE Rolex book. If you love Rolex, this book is a must.