There was a time when cookbooks were for cooking. Now recipes are being moved aside to make room for lots of author personality and just about everything else: travel notes, politics, art photography, even fiction.
I still buy cookbooks, but they definitely need to be part entertainment. I love ones with stories about the chef or restaurant. Momofuku looks good, but I wouldn’t cook the recipes, so I passed on it. Cooking for Geeks has been a good read.