After a year of this, a therapist pointed out that you can have bad days on good sleep and good days on bad sleep. That finally made it click that it wasn't logical to worry about bad sleep so much. I just stopped caring and that mostly got me over it, but I still have more bad nights than I ever used to.
If I see people reading the book, I warn them about it even though it feels a bit rude to tell someone not to read something.