It's a very good spiral guide. I started using these guides once i was loaned one for a trip to Dubai. It was excellent! This Barcelona guide is great and it's the latest edition (May 2010). I found the street map more difficult to navigate than the Dubai guide, but that must be because Barcelona is so big and complex!
I was going to buy the guide to Spain which was an option, but after looking at the Spain guide, it's best to get guides for the areas your going to visit. Spain is just too big to squeeze into one guide!
The Barcelona AA guide has all the info you'll need: Street / Metro maps, all the tourist spots, entrance costs, times, emergency translations and phone numbers for local services. Places to be careful, recommends restaurants, bars etc. Info on Hostels and Hotels, Journey times and costs to and from the airport etc.