I don't know if this matters a whole lot, but thought I would throw it out there.
Would there be ANY benefit at all to being able to search your LIBRARY from the Search Tool window?
So, if one is doing a search on a particular topic, any books in your LIBRARY that contain that word in its TITLE or SUBJECT would show up in the SEARCH results.
Sometimes it could be the case that when we do a search, we search HEADINGS in Dictionaries, etc and may not realize we have a few whole BOOKS on that topic.