If you want a no-frills guide to a huge range of cocktails, this book really delivers. As well as the basic terminology (types of glass, essential equipment etc) it provides brief descriptions of most spirits, gives an indication as to how "tasty" each coctail is, an indication of the alcohol content and a short summary of where it originated.
The indexes are also really useful, listing cocktails by name or by main ingredient... Found a bottle of Creme De Cassis at the back of the cupboard? Just flick through the "index by ingredients" for some inspiration on how best to get rid of it!
All-in-all one of the best general cocktail recipe books I've come across.
My only change would be to print it on splash-proof paper!