Can I copy or share DRM-protected e-books on other computers?

It is possible to copy DRM-protected e-books to other devices, for example, as an email attachment or via USB memory stick. However, you can open these e-books on the other devices only if you are logged in to Adobe Digital Editions with your Adobe ID. Other people cannot open/read the e-books.

Digital Rights Management (DRM) protection is used by book publishers to protect against piracy.
However, using Adobe Digital Editions software and your Adobe ID, you can read your e-books on multiple computers or devices. To do this, you must sign in with your Adobe ID on each device to ensure that you are the rightful owner of that e-book. You can sign in with your Adobe ID on a maximum of six devices (PCs, e-book readers, tablets, smartphones, and so on).