[gtt]

and Michel Houellebecq seems to use similar process:

INTERVIEWER

What is your writing schedule now?

HOUELLEBECQ

I wake up during the night around one a.m. I write half-awake in a semi-conscious state. Progressively, as I drink coffee, I become more conscious. And I write until I’m sick of it.

[laurex]

This explains a lot about Houellebecq's writing.