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I'd be happy to help. The practice files can be found on the page for the book on oreilly.com. Under the buying options there is a "Essential Links" section, and in that area you will want to click on "Practice Files." You can then download the practice files from that page.
If you would please let me know the exact title of the book you have I would be happy to send you the link to the page where these files can be downloaded. I hope this helps and have a great day!
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