I'm going to order a 27" iMac (loaded) in a few weeks. I'm coming back to Mac after a 15 year hiatus (that's a polite word) with a series of PCs. My last experience with the Mac OS was 8.x, I believe. I'm excited about the new computer, and have no experience at all with OS X. So I thought it might be nice to spend the next few weeks pre-iMac-arrival with some good books about the OS. Here's what looked most relevant to me on amazon.com...would appreciate comments and guidance from those of you with more knowledge/experience than I: *OS X Mountain Lion all in One for Dummies (Mark Chambers) *Switching to the Mac: The Missing Manual Mountain Lion Edition (David Pogue) *OS X Mountain Lion: The Missing Manual Mountain Lion Edition (David Pogue) *OS X Mountain Lion Pocket Guide (Chris Seibold) Any words of wisdom for me about what to read before the "new baby" arrives? Thanks in advance.