The thing to keep in mind is that the more carbs you eat, the less fat you should eat. But if you bring your carbs down to 100 grams a day or less, fat is quite safe.
The book “Protein Power” by the two Dr. Eadeses explains a lot of the science behind Low Carb dieting in an easy to understand way.
The recent book by Gary Taubes, “Good Calories Bad Calories” gives 600+ pages looking at all the research done in the diet area since the 1940s and shows how a few politically powerful scientists were able to get authorities to ignore all the research that conflicted with their own beliefs and their own sloppy studies which spawned the “low fat” diet fad.
Taubes cites a lot of research linking cardiovascular disease with a high carb diet and also showing why sugar with it’s high load of fructose is harder on the body than even starch. The high fat diet appears to turn off some of the mechanisms that cause raging hunger.
Just don’t combine fat with a lot of carbs, because that is an unhealthy diet.
I was very lucky that I was raised in the days when people knew that starch and sugar were what made you fat and that sugar in particular was hard on blood sugar. I never signed on to the low fat dogma except for one horrible month right before I was diagnosed when eating a low fat diet made me near-crazy.
But dieting with a low carb diet all my adult life kept my weight normal, even though I come from a family with a lot of heavy women.