Iron Curtain: The Crushing of Eastern Europe (2012) and Between East and West: Across the Borderlands of Europe (1994) by Anne Applebaum
Anne Applebaum’s recent book is so good, I’ve been working my way through her back catalogue.
Two books about the “borderlands” of Europe – Poland, Lithuania, Ukraine, Hungary, Belarus and Moldova – their crushing and Sovietization following 1944, and subsequent re-emergence in the 90s are excellent if you have an interest the region, its history, and the recent destablilisation.