I haven't taken the A+ test yet, but I can say that "CompTIA A+ Certification" by Michael Meyers is a good book and comes with a CD. I know in my area and I can't say the same for others, but where I can take a majority of my IT tests has 1-on-1 training for a PRICE, practice tests for a reasonable cost, and of course your certification tests.
Funny thing is since were on subject about testing. I forgot when I worked for this tech temp agency I had access to 3,000+ training sessions for whatever I wanted to study in. I'll have to check to see if I can still log in and see what the name of it was.