I discovered this amazing book at the Conchologists of America (COA) 2008 Convention in San Antonio, Texas (July 5-9, 2008). It is a pretty heavy book as far as shell tomes go, and hardcovered. It is also a nice, thick (about 1.25"), and large (about 9" x 12") volume offering scientific data on an exceptional variety of marine gastropods (snails).
The book is in full color, consisting mainly of plates of shells arranged in typical fashion for this subject, ranging from lower-evolved (cowries and murex) to more higher-evolved species (cones and volutes). It differs from Tucker and Abbott's Compendium of Seashells (another at the top of my shell library list) in that shells do not display in individual picture frames; rather, 10 to 12 shells are photographed together to fill the page and numbered for reference, corresponding to shell data on the bottom of the page. In cases where the shell is normally viewed from two different angles, such as with a cowry's smooth, domed "top" and the toothed aperture on the "bottom", pictures are provided for both angles.
The only real anomaly - I hesitate to call it a complaint - I had with the book was in the index. While the index is well-detailed and easy to use, whatever software was used to print the index had the apparent tendency to bunch together the letters of the longer scientific shell names. So, while "Cypraea lynx" (a cowry) may be easy to read, "Xenophora conchyliophora" (a carrier shell) may be almost indecipherable.
All in all, a fantastic volume for any shell library. And this is not just a collection of great shell photography by an amateur - Alain Robin has co-authored several other shell references, including one on Mitridae with Jean-Claude Martin and another on Fasciolariidae with Daniel Mallard.
In 2008, I paid $50.00 for this book, about what I would expect for a full-color, hardcover book of this thickness and detail. Sad that it is out of print, but keep looking for it...it's worth the effort!