We were a little slow to join the air fryer craze, but that's because we seldom eat or make fried foods at home. When we found a Ninja air fryer at Costco, and read up on the versatility of the appliance, we decided to give it a try. In two months we have used it on-average about two times a week. We started with recipes found online, and as we got more comfortable and familiar with its capabilities, decided to invest in a cookbook. It seems the better cookbooks, ones that have good instructions and sufficient illustrations, are more expensive.As I see it, there are two types of air fryer users. There are those who wish to use it to heat or fry prepared foods that come out of the store's freezer case, things that are home-style 'fast food' and require few added ingredients and/or added steps in preparation. Then, there are those who wish to use it to prepare square meals from scratch that dress up the meat-and-potatoes theme. We fall into the latter category and this cookbook is designed for us.We own and use another America's Test Kitchen cookbook, so knew this one would be worth the cost. While we've only just started to use it, I already have some observations. Some recipes require meats or ingredients I doubt even the best chefs have on hand, like game hens, garam masala, thai chile (a pepper), or pomegranate molasses. Because we are retired and have the time to plan menus a week in advance, and can pick up the odd ingredients ahead of time, the recipes don't faze my husband and I. My second observation is that some of the recipes are dish-intensive, so that adds to clean-up time and dishwasher crowding. Still, not a game changer. The results are worth it. We made the Roasted Bone-In Chicken Breasts and Fingerling Potatoes with Sun-Dried Tomato Relish, page 32, and the results were delicious. We had to adjust cooking time because our store-bought breasts were apparently much fatter than the ones used in the Test Kitchen. But, we made copious notes in the book to aid us the next time we use the recipe. And, yes, the resulting chicken and potatoes looked every bit as appetizing as the illustration. So far, so good!