Reading for the first time: "A short story of nearly everything" Bill Bryson.
It is really good, gives you a good idea of ALL sciences and what are the main figures, discoveries and aims in every branch. Highly recommend.
Also "Greek legends and myths" by A.N. Kun. Pretty good, although it doesn't get into much detail.
Re-reading: "The Prince" MAquiavelli, "El Lazarillo de Tormes", anonimous,
"The art of war" good old Sun Tzu.
Bookmarks