I'm actually working on an app to replace my Delicious Library, but at least at first solely focused on books and supporting multiple users and features I misse

I'm actually working on an app to replace my Delicious Library, but at least at first solely focused on books and supporting multiple users and features I missed in the original. If all goes well I expect to have early version ready by middle of this year. While some features will require subscription, features not incurring ongoing costs won't. I like to think of it as an example of social software for introverts :) I am hesitant to talk about details, but I haven't felt so excited about something in a long time.