My 2c, from personal experience and comparing ideas from various people, is that there is no one correct diet and thus no special diet book. One eats differently when sick than when well, and if your ancestors were in the North Pole for the last 1000 years you'll need a different diet than if they were from the Carribean. The field is mostly about selling books, supplements etc and it is useless for being healthy.
IMHO, you can equal the diet advice from any book by approximating the Greek Great-Grandparent diet:
Imagine your great-grandparents were Greek or Italian, loved life and had an intact family.
Then eat what they would have, at regular times as they would have, in no rush ("don't wolf down your food!") with usually good company, in the amounts they would have (food was expensive then) but cut in half bc we don't get water from a hand-pumped well and so on.
Everything else will end up being included. Gut bacteria follow the food you eat, not supplements: ditch the ice cream and have more vegetables, then more desirable bacteria will result. Same for dozens of other issues. But of course there's no sales of miracle pills, consultations etc etc on the Italian Grandparent Diet.
