Much more than a book on Spanish this book gives valuable insight on how change operates on languages and everything is written in a manner that can be understood without specific linguistic knowledge. All that I expected and more. The only thing that's still missing for me is an explanation on why latin evolved in this particular way in the Iberian peninsula (latin with a vandal accent?) but that's probably mostly speculatory and this book is not about speculation. Anyway, if anyone can give me a title of a book speculating on the above and/or a similar book on German, English or French I'd be greatful.