[Quiza12]

You are correct - John Irving writes his endings first.

https://www.backwordsblog.com/single-post/2016/04/27/john-ir...

"People have commented – sometimes with irritation, sometimes nicely – on the amount of foreshadow that there is in my novel. Well, yeah, it’s not that hard to foreshadow what’s coming when you know what’s coming…I write endings first. I write last sentences – sometimes last paragraphs – first. I know where I am going. I write collision course stories."

[narag]

I've just re-read Foundation original trilogy to wash the bad taste that the first (and for me last) season of the TV series left on my mouth. I was surprised to find so much foreshadow in the second and third books for the key twists in the plot.

By the way, Asimov is mentioned in TFA, that makes sense. With our Corín Tellado, he was one of the most prolific authors ever.