If you want a basic understanding about bird migration themn this book is a worthwhile read. The writing however is sometimes uneven, rapidly switching from examining spring migration to commenting on fall migration in the same section. Additionally there seem to be several redundancies. I founbd myself reading the exact same information in several areas of the book. This I feel is more the result of editing than composition, That the author knows whereof he speaks there is no doubt. That he gets his information across, again there he excels. I wish only that the book were more structured and flowed more evenly. I do however recommend it with no reservations. ( )