I agree that the WOW series is good. I have them for both Photoshop and Painter. Another book I've found helpful is "Photoshop, Painter & Illustrator Side-By-Side" by Wendy Crumpler. There is a new version out covering the 7s. On the magazine front there is also an English publication called 'Computer Arts' which always has good Photoshop tutorials and tips.( Lots but less for Illustrator.) Its aimed at professionals and serious amatuers. Check out their website. Manuals are fine to a point. I personally haven't turned to other books out of lazyness. If you're prepared to tackle both Illustrator and PS 7 at the same time you'll need to be anything but lazy !

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