As part of our preparation for the big move, I have purchased the book Living Abroad in Spain. Technically, it's the second of the series I have purchased but this one is the latest edition that was published just last year. This book is worth every cent and is definitely one we will be taking with us because of all of the excellent resources mentioned through out.
The book is great because it gives you a first hand account from a real expat in Spain. It covers details such as visas, employment, apartment leasing, transportation and the medical system as well as the basics like culture, climate and prime living locations. If you are considering moving to Spain I highly suggest picking up a copy of Living Abroad in Spain.