I guess if you're after a field guide this isn't it.
Its more of a guide book to some good birding areas.
Personally I thought it achieved this goal adequately, however there are many gaps, after all the book is only 300 pages!
Its an excellent little book for planning that walk, or a weekend field trip, and is worth packing if you're unfamiliar with region.
In summary, if you want to identify birds, get a field guide, if you want to start to explore the south of France, pop this book in your bag.