Though more to your point I recently finished Mathias Enard's Zone - three months to read. It is 517 pages long, one sentence, a stream of thought. A difficult book to say the least, as the topic, dealing with not only the melancholy of the narrator's life but how his theme has remained the same for thousands of years. Zone will have a lasting impact on my ideological outlook for the remainder of my life.
As a break from hard topics, I am now reading How to Listen to Jazz, as an avid jazz listener.
For me its seems ridiculous, even numbers some people mention here, like 50-100 books per year. If one has 100% employment, this doesn't leave much space for this thing called real life, in whatever unique manifestation. But hey, at least they don't shoot heroin, right?