I first read about this book in the New York Times. It had good reviews and from the Times recommendation, I bought it. It is not the best of books for shell identification. Abbott's "Compendium of Seashells", is so far the best for identification. As a collector, naming the shells that you see or have is a great pleasure.
This book still lacks the comprehensiveness of Abbott's, but it is fair enough. Compared to most other books, which are just art photographs, this one combines beautiful photography with enough entries to place your specimen.
One wishes that there are more entries, but it is heavy enough. For the more advanced collector, it is sufficient.
A point in its favor, that Abbott's doesn't have, is its "actual size" posting.
For the professional collector, one has to go to regional books of shells of the regions. Alan Hinton's books of shells of the Australian and Papua New Guinea, and Fely Leobrera's "Shells of the Philippines", are very good in connecting one's knowledge about very common and rare shells. And for those who are starting, "Fields Guide to Shells" is the best.