Some of the article sounds loony (eg Paleo diet, and 1 gallon of milk/day), but much of his advice is good. If you are a scrawny person, or lack adequate muscle development, you might be interested in his advice.
A beginners guide to getting bigger and stronger
I was a scrawny but able athlete when I began college. The college coaches gave us 60 minutes of weight training 2 days/wk for both of my sports, a half-hour of calisthenics on the off days - not to mention 2 hrs of team practice each weekday. That was usually an hour of drills and an hour of match play. Coach prescribed diets for us to go along with this, very caloric diets high in protein but also high in everything else including ice cream. The results in good weight gain, energy, wholesome appearance, and overall fitness were remarkable. We were young, of course, and adjusted quickly.
The most difficult issue for adults is scrawny, but with a gut. Rx for that is protein and fat, and just enough carbs to function. The human physiology was not developed for our luxurious world of protein and caloric abundance.
Most of the article is of general application for gals or guys, although there is no need for any guy to look as buff and tough as the author. That's more vanity-oriented than functionality, I think, but he says he grew up as a skinny wimp so it's understandable. The critique of cardio is well-taken, because the way most people do it is a waste of time. At the end there is a part specific to women. (Interesting to note that exercising women need half the amount of food that men do.)
Photo from the article of the author's friend Staci before and after putting on 25 good lbs. That is a fit young lady, but she could easily benefit from another 5 or 10 lbs, especially if she wants to bear kids sometime:
The advice obviously does not apply to those who are overweight. That's another matter.