AppleScript: The Missing Manual, written by Adam Goldstein, published by O'Reilly Media, Inc. | A primer to help you learn the basics quickly. |
AppleScript: The Definitive Guide, 2nd Edition, written by Matt Neuburg, published by O'Reilly Media, Inc. | A great book on the AppleScript language. Good for people who already know another language, such as VBA. |
AppleScript: The Comprehensive Guide to Scripting and Automation in Mac OS X, 2nd Edition, written by Hanaan Rosenthal, published by Apress | An exhaustive, step-by-step guide, especially good for beginners. |
Beginning AppleScript, written by Stephen G. Kochan, published by Wrox Press | A step-by-step guide for beginners. |
AppleScript Handbook, Mac OS X Edition, written by Danny Goodman, published by SpiderWorks, LLC. | The most compact, all-purpose AppleScript guide. |
AppleScripting the Finder eBook, written by Ben Waldie, published by SpiderWorks, LLC. | A useful resource when scripting for the Finder. |