Adobe ACROBAT READER 7.0 Manual page 239

Sharing Digital Editions with others
You can email a Digital Edition to someone else if it contains a URL for the Digital
Edition retailer. If the recipient tries to open a Digital Edition for which they don't have a
license or permission, a dialog box prompts them to obtain the license from the retailer.
To email a Digital Edition:
1. Select the thumbnail or the book title in the My Digital Editions bookshelf.
2. Do one of the following:
Click the Email button.
In the thumbnail view, right-click (Windows) or Control-click (Mac OS) and select Email.
3. Select the email option you want to use, and click OK.