Hi everybody, i'm new to this community so please forgive me if i'm posting at the wrong place. i am planning on getting an Apple certification and starting off easy, i have decided to get the Mac integration 10.7 first. Apple's website has directed me to Peachpit's website, who had published a couple of books for preparation of the certification exams. my question is, are the books a necessary buy? I have read over the pdf on the website and everything seems relatively basic and simple. does the book cover some materials that i need to know thats not covered in the pdf? anyone that can provide me with help is truly thanked thanks!!