WIY – Tom Holt is a fiction writer of mostly satirical and often parodical novels. I was being slightly facetious with that comment. But you should read the book, it is very funny.
Your other comment about creation does not make sense because although the egg is the result of procreation, the difference between egg-laying creatures needs to be highlighted. Mammals have the ability to procreate within them, and the foetus does not need an outside environment to complete gestation. Birds and fish, however, need to lay their eggs in order to complete gestation, and therefore the egg itself is a separate being. Therefore, Hashem could have conceivably created the world with both chickens and eggs.