Perhaps ironically, I set out to read this mainly to learn about how to substitute for eggs to cook and bake for an egg allergy. The book was somewhat helpful for this - there was an informative small section on substitutes, and more importantly, what purposes different parts of the egg serve in different recipes (emulsifier, leavener, etc). The various egg dishes described were interesting, although it made me yearn for a collection of the best writing about eggs from other sources - perhaps inspired by Ursula Le Guin's writing on the joy of a soft boiled egg.