Some of the authors, apparently, don't read for fun. One said, "I read up to fifty books researching one of my novels. I don't have time to read for fun." Another, "Reading novels of the same type I write is not fun. I can't help quibble over how the author said something or plotted the story." John Sandford, however, mentioned a couple of authors he reads, including Alan Furst. I picked up Night Soldiers on the recommendation. I am 10% into it, but I am hooked and impressed with what seems to be an authentic rendition of the slavic soul.
Another writer who captured the feel of Russia (I caught the briefest personal whiff of it in 1992 on a visit to Kiev and Moscow) is Martin Cruz Smith's Arkady Renko series.