Firepower - by Paul Lockhart. A history of military advances, of guns, big and small, mainly in the West, mainly after 1300. Very impressive overall, but for me the most eye-opening was the arms-race preceding WW1. Nothing in the Cold War arms race came close to that.<p>The Rules of the Game - by Andrew Gordon. This is a 50 year history of the battle of Jutland. Meaning, one of the most thorough accounts of the battle of Jutland, plus a very detailed history of the 50 years preceding it, and the military/cultural background that led to the events at Jutland unfolding the way they did. A little innocent spoiler: after reading this book, you'll come to appreciate (like me) that one of the most consequential events in the world history (at least of the last two centuries) was the collision of HMS Victoria with HMS Camperdown two decades before the start of WW1. What a tragedy. There's a good chance that if that collision did not happen, then WW1 would not have happened, because Great Britain would have still been un-challengeble on the seas.<p>Freedom's Forge - by Arthur Herman. How America mobilized itself on the economic front. Unleashing the US industrial production juggernaut seems like preordained in hindsight, but it was anything but that. This book is a page turner. Once you start it, you know that you'll finish it.