I have to say that this is one of my favourite books. Despite being aimed at the American market, it is very easy to read.
Part 2 of the book splits birds into families, many of which are common to both the U.S. and Europe, so whilst the specifics are American it doesn't detract from providing some very useful information.
Opening the book at random I have chosen the section on Swallows and Martins. Following a very short introduction there are short sections on taxonomy, species variation, food and foraging, breeding, conservation, and accidential species to the U.S.
Part 1 goes into more detail about birds in general, discussing flight, plumage, moult (molt) physiology, origins, evolution, classification,species concepts, behaviour (behavior), migration, communication, breeding, habitats, populations, parasites, conservation, etc.
All in all, well worth getting.
Darrell