Oh, the opening of 'Non-Zero Sum' hits you right away with that heavy, almost suffocating atmosphere. It starts with the protagonist, Leo, staring at an algorithm on his screen that's predicting failure rates with unsettling accuracy, and the numbers just keep climbing. There's no big action sequence, just this dense sense of dread as he realizes the system he helped build is about to collapse. It's all internal monologue, this frantic, quiet panic as he tries to figure out who he can even tell without triggering the disaster faster. That first chapter basically traps you in his head while the world outside his apartment window still looks perfectly normal, which makes the whole thing even creepier.
I remember putting the book down after that first chapter just to absorb it. It doesn't introduce a huge cast or a complex setting; it's a man, a code, and a countdown. The 'story start' isn't an event, it's the moment his certainty shatters. The last line is something like him reaching for his comms unit, his hand hovering over it, and you're left wondering if that's the button that starts everything or stops it. It's a masterclass in building tension from absolute stillness.