I got my copy of Maria Emmerich's "Keto Instant Pot" recipe book yesterday. (This book will not be available until December 18, but she sent me one.) "130+ Healthy Low-carb Recipes for your Electric Pressure Cooker or Slow Cooker." She does a lot of explaining about Keto in all her books and then they are packed with recipes.
Keto is a lifestyle way of eating: High fat, medium protein and low carbs. There is no sugar in this book.
It's a beautiful book with piles of beautiful full-color pictures, and each recipe tells if it is gluten free, dairy, nut or egg free. And most recipes give options for using these or a substitute.
Her other books have been available at Costco, but you can get in touch with her at: MariaMindBodyHealth.com