Scriptorium tracks my books (reviews, quotes, reading lists). It integrates with Goodreads (as far as still possible), Calibre and various online APIs. It's currently powering books.rixx.de.
This project is under heavy development, but stable enough to run books.rixx.de. There are still plenty of actions that require you (me) to use the shell, it's nowhere near an out-of-the-box solution to hosting your books (and it likely never will be). After setup, adding books via the web interface is possible, though!
tbd