Once your payment has been received, we’ll email you a download link. Once you click the link, you’ll have 24 hours to download your e-book before the link expires. This e-book comes in a ZIP (compressed) file that includes two file formats, PDF and EPUB. On a Mac, simply double-click the zipped folder and a new folder will appear with your two e-book files. On a PC, open the zipped folder, then drag the files from the zipped folder to a new location (like your desktop).