Space-Time Structure, by Erwin Schrödinger. Great read to understand complex systems, manifolds and tensors. And... A History of Warfare, by John Keegan. Grea

Space-Time Structure, by Erwin Schrödinger. Great read to understand complex systems, manifolds and tensors. And... A History of Warfare, by John Keegan. Great analysis of various cultures and how they have approached war across history.