There is a good book, but old, written originally in 1924, called Fresh-Air Poultry Houses.
By Prince T. Woods, MD. It's available on Amazon. The entire premise of it is ventilation, ventilation, ventilation. Has tons of examples in places very far north, some pictures of coops buried in snow. It's very good for examples of how to make a healthy coop for chickens, and most of them are almost entirely open on one side (with screen/wire for security) or with one side being mostly window area. Many confuse 'ventilation' with 'draft', ventilation being good, and draft being bad, two entirely different things. They need shelter from predators and the worst of the weather, but the more ventilation the better.