I have had this book for over 20 years now. Caught my interest back then. Going through my books , I came across it and brought it out to have a look-see. Now I know why it is I have it. With an Indian Heritage, I must have wanted to connect. I came arcoss an ingredient for "Culinary Wood Ash". They tell you how to make it or substitute it for baking soda. Has something to do with the mineral content. I will be reconnecting and trying a many a recipe. Has some great pictures.