I've done exactly the same as itimpi for my 'Novels to be read soon' list.
I have 2 libraries - Novels and Reference (Art, Craft, Hobbies, Computer manuals). I decided to split off the Reference books for 3 reasons:
- - many more tags required and a completely different set to the Novels library.
- - my Reference books are all PDF, CHM or CBZ and generally unsuitable for any of my current readers (too large, need colour)
- - difference in which metadata columns are most important for the library view window, e.g. Author, Series most important for Novels, but Tags most important for Reference.