I just wanted to know if the A+ Certification All-In-One Exam Guide is better than his other A+ books (passport, etc.) and if their is a real difference in the varying editions. I can only find the 1st edition (2003) online ($30 cheaper than at the Chapters store in Canada) while it lists edition 4 as being published in 2002? I know that edition 6 is due in September but I can't even find the fifth edition anywhere. Any ideas for online stores?