We discovered yesterday that the знание bookstore in San Francisco has been closed for about two years. (!) Years ago, they would handle our subscription to Kazan Utlary. We were able to find a far a more extensive selection of books relevant to Tatars at the Szwede Slavic Books in Palo Alto, but the ladies at знание were helpful as well.
They still have a web presence, but the webpage triggers our anti-virus alarm - a sad exclamation ending another bookstore.