Hello, this is my first post here

. I came across this website while looking for info about the A+ certification.
After reading about the changes they are about to make to the certification next year, I'm still confused as to why people refer to taking one exam or the other. Aren't both exams (hardware + os) required in order to be certified?
Also, what book should I get if I want to study for both (A+) exams. I visited amazon.com but there seem to be many different books, some not available until december. I've been fixing computers for a while now and have put a few together so I expect to be familiar with some of the topics. I went through 4 semesters of CCNA training while in high school but never got certified. I would not be so interested in the A+ cert. had it not been because I want to apply or a job that requires it. Any additional info on how it all works and how long it usually takes from the time someone starts studying to the time they get certified would be greatly appreciated.
Thanks for your help.. Great site!