After taking the liberty of posting in my principal blog Mathematics under the Microscope an old letter by Donald Knuth on calculus reform, Donald Knuth: Calculus via O notation, I got 20,000 hits in 24 hours. I always knew that Donald Knuth had cult following, but I never thought that his fans followed him that close. Perhaps it is place to mention Knuth’s most personal book:

Things a Computer Scientist Rarely Talks About (CSLI Lecture Notes)

Things a Computer Scientist Rarely Talks About (CSLI Lecture Notes) . I strongly recommend it to you regardless of your (a)religious convictions.