None.
The investment in starting a book is negligible to me. I mainly borrow from the library or buy used. And I don’t hesitate to stop reading books that aren’t working for me.
I finished Blink because despite its repetitiveness, Gladwell is an engaging writer. A similarly repetitive writer is Nassim Taleb. I abandoned “The Black Swan” because it could have easily been an HBR article, and Taleb is insufferably arrogant.
I finished Dark Matter too. It was a quick read and entertaining enough. I can’t recall off the top of my head an abandoned novel, but I know it happens several times per year. I suspect it’s because they’re all so forgettable
If you want to read more great Vietnam War fiction, read “Matterhorn”, by Karl Marlantes
I consider it to be one of the best novels I have ever read. Unforgettable