Enjoy the calm atmosphere at Kunsthaus Koflach while perusing the books, magazines and other literary resources. See if you can find some board games as well.
You'll be spoiled for sightseeing choice when spending time in Koeflach. Kunsthaus Koflach is a good place to begin here, but there are lots of other fine spots to discover. Lipizzaner Museum, Hundertwasser Church, and Österreichischen Freilichtmuseum are not far from the collection of books and will round out your day nicely.