One of the most well-known bookstores in Russia, Dom Knigi (House of Books) can be found throughout the city. It’s worth just walking through them. They often have foreign literature (translated into Russian and in the original) as well as pocket flip-books. These pocket flip-books can be seen in the hands of Metro commuters as they are designed to be easily held and read while holding onto the bar in the train.
There's also a cafe and free wifi.