You don't have to stick with these recipes. They're guides. As I say, they're a way in. Have fun with them. It's an easier way to cook in a busy life, once you get the hang of it.
That being said, I often write into recipes techniques I learned in the restaurant kitchen. There are ways of organizing your prep and so on that are immensely useful. Those are woven into all the recipes I do.
There are a lot of very simple recipes in the book, and there's a huge amount of material to help people understand how things work.