I've been using Photoshop 7 since it came out and can't now afford to upgrade to CS5. I'm very familiar with the bits of the program that I use daily but I've never had the time to get into the other parts of it like filters, actions and automating tasks. I once read right through a fat and intimidating 'Photoshop Bible' style doorstop of a book but, exhaustively comprehensive as it was, there was far too much for me to take it all in.
Teach Yourself Visually is a perfect refresher course for someone at my level of expertise, reviewing what I'm already familiar with, but in a friendly way taking me into the areas that I've always shied away from. Because it's divided into colourful double-page spreads each on one specific task, it's very easy to pick out a particular topic if I want to go back to it.
I like the cheerful over-the-top illustrations; they add a touch of fun and they're easier to navigate through than a book that consists solely of text and monochrome screenshots.