Vicky
I've heard of that book but never got around to reading it.
I'll be checking it out soon.
I should say that, I've known a few people who have killed themselves, deliberately. My experience is limited, of course, but the impression I got each time was, they felt they were battling, had been defeated and resigned, letting their opponent, real or not, win.
But more importantly, in each case, with one exception, they did it in such a way as to harm others. Jumping in front of a train, the train driver never recovered. Another hanged himself in a wood where his body was found by some children walking past. Another hanged himself in his garage where his wife found him.
The numerous cases of overdose I've worked with, generally, the person ends up changing their mind during the wait.