The Hacker's Diet has helped me lose a good bit of weight over the years, but it is a somewhat simplistic model. Metabolism isn't quite as simple as CICO and can adjust over time to compensate for lowered metabolic rate. Herman Pontzer's recent book, Burn: the Misunderstood Science of Metabolism, goes into metabolic differences in quite a bit of detail and is very well researched and based in science.

https://www.chemistryworld.com/review/burn-the-misunderstood...