Fiction
Clifford Simak: City
Ted Chiang: Stories of Your Life and Others, Exhalation
Terry Pratchett: Small Gods, Jingo, Going Postal
Robert Heinlein: The Moon Is a Harsh Mistress, Starship Troopers
K.J. Parker: The Folding Knife, Sixteen Ways to Defend a Walled City
Orson Scott Card: Ender's Game
Politics/Sociology
James Burnham: The Machiavellians
Alex Karp: The Technological Republic
Friedrich Hayek: The Road to Serfdom
Dan Wang: Breakneck
Classics
Plutarch: Life of Lycurgus
Tacitus: Agricola
Richard Saller: Pliny's Roman Economy, Patronage in the Early Empire
Walter Scheidel: State Power in Ancient China and Rome
John R. Hale: Lords of the Sea
Science
Richard Feynman: Surely You're Joking, Mr Feynman!
Walter Rudin: Real and Complex Analysis
Raymond Smullyan: This Book Needs No Title