Meyers is THE book when it comes to A+. Inputs humor, although dry at times, and lays things out in such a way that it clicks, or at least for me. His N+ are good, but lack a lot of the detail for DSL and the like, but this is mainly due to the fact that they added to the test after the book was published, there's an updated version slated for release in 2-3 months. I'm working on MCSE XP now, since support for 200adv serv is rumored to go buh-bye sometime in march. As soon as they release the service pack, i'll start looking for a meyers version.
As far as this deal goes, i'd suggest getting the all in one version, not just the passport as it's meant more for a quick referesher/study. It's a great resource, irregardless of testing. And worth the $40.