The DeACSM_0.0.15-beta2204 works great with Siduction, Debian/unstable.

without errors from console:
Code:
Notifying optional server https://ofs.contentreserve.com/ACSNotificationService.svc/Notify
Weird Fulfillment Notification response:
DeACSM v0.0.15: Downloading book ...
DeACSM v0.0.15: Loading book from https://acs.cdn.overdrive.com/ACSStore1/(…).epub
Download took 517 ms (HTTP 200)
That's a ZIP file -> EPUB
DeACSM v0.0.15: File successfully fulfilled ...
DeACSM v0.0.15: Executing plugin DeDRM ...
DeDRM v7.0.0: Trying to decrypt lh3do74u.epub
DeDRM v7.0.0: Verifying zip archive integrity
DeDRM v7.0.0: lh3do74u.epub is a secure Adobe Adept ePub
DeDRM v7.0.0: Trying Encryption key default_key
DeDRM v7.0.0: Decrypted with key default_key after 0.2 seconds
DeDRM v7.0.0: Finished after 0.2 seconds
DeACSM v0.0.15: Plugin returned path '/tmp/calibre_5.42.0_tmp_w902eah0/bje1t60i.epub', updating.
Thank you Leseratte_10.