Principia Mathematica by Alfred North Whitehead
Published 2010 · 260 pages · 71,500 words · about 4 hours at an average pace
How hard is Principia Mathematica to read?
Principia Mathematica scores 26 out of 100 for difficulty on ReadingRate, making it relatively accessible. The score is a weighted composite of nine measures: four of how hard the prose is to parse, five of how hard the meaning is to extract.