My comment wasn't purely speculative. That would be unfair. It contains the thoughts that I had after reading your sample.

Here's one excerpt

Kôdô Sawaki says: if you need to sleep, sleep. Don’t plan your software when you are trying to sleep. Just sleep. If you code, code. Don’t daydream—code. If you are so tired that you cannot program, sleep. Even known multitaskers like Stephan Uhrenbacher have decided to work singlethreaded

Who's Sawaki? Who's Uhrenbacher? This is what I mean by missing context. Now that I think about it, some of the criticism (mine included) may be due to the fact that you picked the final chapter to represent a sample. You pretty much gave away the ending, and we have no clue how you got there.