Start with high-confidence post-soviet russia books, then narrow by subgenre or adjacent topics.
Motherland
Julia Ioffe
The Road to Unfreedom
Timothy Snyder
Volga Blues
Marzio G. Mian, Alessandro Cosmelli
Tanks in Ukraine 2022
Mark Galeotti
Nothing Is True and Everything Is Possible
Peter Pomerantsev, John Curless
Odyssey Moscow
Michael Calvey
