If you take chocolate seriously, this book is a good overview to understand it better. Loved the price on Amazon - the author sells it for $75 a copy on his web site!

A ton of info packed into a 2 hour read. Thorough groundwork for the chocolate novice. Straight to the point and worthwhile.

This is an excellent overview of chocooate and its production. Well written, illustrated and authorative.

This is a very useful textbook if you're in the market to either become a chocolatier, sell chocolates, or promote a local chocolate tour. It has lots of points that you can quote as an expert connoissuer. If you're however just someone who basks in the sensual pleasure and warmth of a fantastic piece of fine chocolate, and wants good recommendations without a critical dissection of each element of your chocolate, then this might be the equivalent of TMI on a first date.
Other options include:
The Chocolate Guide: To Local Chocolatiers, Chocolate Makers, Boutiques, Patisseries and Shops - Western Edition, and,
Chocolate French: Recipes, Language, and Directions to Français au Chocolat
also Chocolates and Confections: Formula, Theory, and Technique for the Artisan Confectioner and
Making Artisan Chocolates