For cookbooks that really "teach" and "challenge", my favorites tackle a single subject and explore it deep and broad. So it goes with KALE: The Complete Guide to the World's Most Powerful Superfood by Stephanie Pedersen. (DISCLOSURE KALE's publisher provided a complimentary copy but the thoughts, as always, are my own.)
Stephanie's personal story is compelling. She was pregnant on 9/11 and was exposed to a "massive amount of toxins" which were passed onto her son, who was born with heavy metal poisoning which caused a mix of skin, digestive, sensory, sleep and mood disorders. When she began rebuilding his immune system, kale purée was a mainstay. She also used kale to overcome her own many health issues. I don't very often "read" cookbooks – call me guilty of skipping straight to the recipes – but I found her introduction to kale much absorbing. Is kale a miracle food? You kind of get that idea. This book isn't written by someone who loves kale but by by someone who thinks kale may have saved her life.
But I totally l-o-v-e the idea of mixing kale into a jar of spaghetti sauce! Taste-wise, the strong flavors of the tomato sauce almost "hide" the kale. The pretty red color of spaghetti sauce doesn't survive, however, with the kale it turns to a dark (but not unappealing) red color.