lalibrairie: The Oxford Union Library, Oxford, United Kingdom On the walls are Pre-Raphaelites murals, painted by Dante Gabriel Rossetti, William Morris and Edward Burne-Jones. It also has a unique clerestory (Wikipedia will tell you all about it here).
How can I get one of these staircases in my dream house? Because it is awesome. Lonely Planet classified this bookshop as the third best bookshop in the world, Livraria Lello & Irmão in Porto, Portugal (by Ricardo Bevilaqua).