I do not recommend this book. I completely (and stupidly) trusted the author and gave my daughter nut butter at 12 month old. She had an anaphylactic reaction. The author also recommends feeding 6 month olds egg yolk. I did so at 12 month. My daughter is also allergic to egg at 18 month. It is impossibe to completely separate yolk from the white, which is very allergenic. After learning a lot about food allergies, I would never, never recommend this book to my friends who are having babies soon.