Still in a very early stage of development (so bugs are plenty and features are less), but nevertheless it downloads books for me on command if available.
Search for authors or books, add them to the database, set books to wanted and watch the magic happen.
Source can be downloaded here, installinstructions are the same as for the other downloadautomation apps (sickbeard/couchpotato/headphones)https://github.com/Mar2zz/LazyLibrarian
I am just a beginning python-coder, so don't shoot me for creating ugly and messy code. Post issues if you want to, but better, post pullrequests with fixes for it if you can. Also be aware it may cause blindness. The template is not the final one, so css is also open for editing/pullrequests.
Pics and installinstructions are on Github.
currently one servertype is supported (newznab-alikes, so nzb.su and other newznabs). It's kinda headphones compatible, I copied a lot of code from Rembo10, so converting other servertypes shouldn't be that hard, but currently I am focussing on postprocessing (which can only be done manual right now, I need to work on a scheduler also which checks every now and then if downloads are finished).
It can send nzb's directly to sabnzbd, but also to a blackhole if you prefer that.
If you are going to use it, use it at own risk, and don't be mad if de database or config.ini sometimes must be reset/deleted until LazyLibrarian is more mature and stable.