transfer e-book between computers in Adobe digital edition

Moved to Adobe Digital Editions

from http://www.adobe.com/products/digital-editions/faq.html

4. Books can be copied from one device to another device. If two devices are activated with the same ID, purchased books can be opened on the other device. If the other device is not activated or if it is activated with another ID, a pop up window will appear to ask for ID when opening the purchased books. Borrowed books cannot be opened on another computer regardless its activation status. It is because that the loan token is not copied.