The Russian-language bookstore www.knigi.pl. One of the few remaining bookstores in Europe offering a wide range of books in Russian. All offered items (those visible on the bookstore's website as available, meaning the shopping cart next to them is not crossed out in red) are physically in stock in Warsaw warehouse. I emphasize this because there are stores operating on a so-called dropshipping model, offering books available in Russia that still need to be shipped across the European Union border.