Adobe Photoshop CS4 for Photographers: A Professional Image Editor's Guide to the Creative use of Photoshop for the Macintosh and PC: Evening, Martin: 9780240521251: Amazon.com: Books
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Amazon.com: How to Do Everything Adobe Photoshop CS4 eBook: Perkins, Chad: Kindle Store
Free Photoshop Brushes From Stephanie - Cracks | The Photoshop Blog | PhotoshopSupport.com