
Here is the revised edition of Charles Dawrin's The Origin of Species, introduced and abridged by Philip Appleman, published by W. W. Norton.
There's not many geniuses without an ecosystem around them that produced them. And even if there are, how would we know about them if they weren't well connected enough to start mattering?
Spoiler warning: Darwin didn't really have any problems with the eye. That's just something creationists say.
Possibly Mein Kampf could compete in short passages by a "reading difficulty" score, but it's really tedious and much longer (by a factor of 5!). Darwin could actually write. Origin of Species was intended for the educated public as well as for scientists.
* "An Introduction to Statistical Learning" by James, Witte, Hastie, and Tibshirani: possibly the best intro to the topic I've seen.
* "Introduction to Linear Algebra" by Gilbert Strang: possibly the best intro to the topic I've seen.
Also, here are some books that are not properly textbooks but could be used as such:
* "Robot: Mere Machine to Transcendent Mind" by Hans Moravec: remarkably prescient, in hindsight.
* "On the Origin of Species" by Charles Darwin: I was surprised at how readable it is.
* "The Selfish Gene" by Richard Dawkins: It made me question a lot about a lot.
* "The Better Angels of Our Nature" by Steven Pinker: I was shocked at the violence in our past.
* "Gödel, Escher, Bach" by Doug Hofstadter: an intellectual tour de force.