The book's editors and I have endeavored to weed out errors and inconsistencies, and I hope we've been successful. However, a fact of life in publishing is that minor errors sometimes slip through. In addition, each time Apple releases an update to OS X, there's a chance that something that worked before no longer does, or that a specific functionality works a bit differently. If I find any errors or the need for clarification, I'll post them on the book's website, http://www.macosxpowertools.com/. In fact, just to be on the safe side, you should check the website before you dig in, to see if any important information has been posted. If you actually find an error, please let me know about it by sending an e-mail to <firstname.lastname@example.org>.
I also welcome feedback from readers: what you like about the book, what you dislike, what you'd like to see more of (or less of), and any suggestions you might have for a future edition. Feel free to send any comments to <email@example.com>. I can't guarantee a response; however, I do guarantee that your feedback will be read and appreciated.