The installation of the 3M Cloud Library app for an eReader is the same as it is for the Nook. View those installation and usage instructions for a fully-functioning eReader.
If you have connected your device and it is not detected, you may need to use the manual transfer method. Additionally, you should check to make sure that your device has been activated with the same Adobe ID as you are using with the Cloud Library.
Some eReaders have software that blocks transfers from the 3M Cloud Library for PC. Users with newer Sony eReaders have reported this problem. The book checks out in the PC software and the device is detected, but the transfer does not work. These steps should solve this problem.