Lurie's "On Infinity Topoi"[0] preceded the book and is, I quote[1], > 50 pages of pure cake, beautifully and informally written. The book is 1000 pages long.

Lurie's "On Infinity Topoi"[0] preceded the book and is, I quote[1], > 50 pages of pure cake, beautifully and informally written. The book is 1000 pages long. There is some new cake there, but not 20 times as much. [0] https://arxiv.org/abs/math/0306109 https://arxiv.org/abs/math/0306109 [1] https://mathematicswithoutapologies.wordpress.com/2015/05/13/univalent-foundations-no-comment/comment-page-1/#comment-209 https://mathematicswithoutapologies.wordpress.com/2015/05/13...