Hi Glenn,
I have spent a considerable amount of time in both the bookshops mentioned by Ivar. Unfortunately I have never seen any Camino guidebooks in English in either shop. There are extensive titles and selections in Spanish (obviously), but not in English. There are a couple of international bookstores, one I know near Plaza Alonso Martinez, but I have never looked in those. It is possible that if you search some of the tourist shops in some of the larger towns along the Camino (such as Pamplona, Logroño, Burgos, etc.) you might find a guide in English. Additionally, In FNAC in Madrid, the Spanish guidebook, Guía práctica del peregrino: El Camino de Santiago by Millán Bravo Lozano contains a set of maps to take along with you. The guide book is quite heavy, but the maps are excellent. I used them for my first Camino and found them to be wonderful. Although the maps are in Spanish, they give you distances, names of towns, landmarks and sites of restaurantes, albergues, etc. with symbols rather than words. It would be helpful and certainly discernible even for a non Spanish reader, I think. Good luck,
Buen Camino,