Just today finished 'The Master & Margarita by Mikhail Bulgakov - written in 1930s but unpublished until 1967. Pre-dates the 'American' post-modern metaphysical style of Pynchon, Foster-Wallace, DeLillo etc by decades. A fantastic read. Rather stuck on what to follow up with - I usually follow some type of thematic link between books.
My wife had read this with great enthusiasm when we met 30 years ago.