Debt: The First 5000 years by David Graeber. One of the most interesting books I have read in years. It goes really deep into how money appeared, how debt not always have to be payed back etc. A really interesting read!

The Wright Brothers by David McCullough. An extremely interesting store of how two brothers got us in the air. A great story on well thought out incremental innovation and especially risk mitigation of something that from the outside looks reckless and dangerous.