That's an interesting idea. Some quick googling and I found there seem to be a number of CMS systems for libraries, some open source, some vendor/closed. That got me thinking that another angle on this would be to write the curator part (e.g. some ML model trained on reader preferences), and provide that as a SaaS to end-users. But I see that something similar already exists[1]... of course.

1 - http://www.whatshouldireadnext.com/