The Crimean War: A History, by Orlando Figes
1781: The Decisive Year of the Revolutionary War, by Robert L. Tonsetic
Bloodlands: Europe Between Hitler and Stalin, by Timothy Snyder
I'm interested in seeing Bloodlands' coverage of Stalin's atrocities, which, though not nearly as systemic as Hitler's, were actually far worse.
And it may come as a surprise to many to hear that the Crimean War was more than The Charge of the Light Brigade.