An excellent source of information is Mac OS X Lion: The Missing Manual by David Pogue. Even though I am not yet using Lion, I bought it for general information before I take the plunge. I have used all his previous books and can vouch for their worth.
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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