21st Century C
Ben Klemens
Opticks: or, A treatise of the reflections, refractions, inflexions ...
Newton, Isaac, 1642-1727
Intuitionistic Type Theory
Per Martin-Lof
The Search for the Perfect Language
Umberto Eco
Mental Language: From Plato to William of Ockham
Claude Panaccio
Maps of Meaning: The Architecture of Belief
Jordan B. Peterson