I knew this book before I bought it, so there was no surprise when it arrived. And yet, there was. It was signed by the author! This is the most extensive review of nudibranchs in the Indo-Pacific. For recreational divers, like me, it's a bit overwhelming in the scope of information provided about these amazing creatures. But, better too much than too little knowledge. The photographs are stellar, and I know that I will appreciate every nudibranch I encounter underwater much more than I did before getting this book. I would say that this is a must for dive operators, if not for individual divers. One way or another, you have to see this.