Bookworm is a Perl Web application that helps me keep track of the
books I have read, and where I keep them.  It allows you to search for
books based on author, title, when they were read, and where they are
stored, as well as searching authors, showing all the books you have
from a given author, and browsing through the books in a particular
location.  Since 2013, I have been using it to sort through my books,
rediscover what I want to reread and what I want to get rid of (I had
well over a thousand at one point!).

   Unfortunately, Bookworm based on some proprietary code I developed at
work, which it uses as a Web framework, so it is not likely to be of
much use to anyone else.  Still, despite being under-documented, it
shows something of the flavor of the framework and how it is used.