Yes, when you setup your Sony account through the Sony Reader Library software, then it also used that email and password to create an Adobe ID for you. You don't need to download ADE for library books if you don't want to. Just open the ACSM file that you download from your library website with the Sony Reader Library software. It will import the library book into the Sony software with the rest of your Sony purchases. The same method applies to books with DRM purchased from other bookstores like Kobo: just open the ACSM file with the Sony Reader software. Right click on the file name will show you the Open With options.
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