What is life?

What Is Life? is a non-fiction book on science for the lay reader written by physicist Erwin Schrödinger. One of the discoverers of the structure of DNA, Francis Crick, credited What Is Life? as a theoretical description, before the actual discovery of the structure of DNA (the existence of the molecule had been known for nearly 2 decades, but its role in reproduction and its helical shape had not even been guessed at this time), of how genetic storage would work and a source for inspiration for the initial research.[1]
In the book, Schrödinger introduced the idea of an "aperiodic crystal" that contained genetic information in its configuration of covalent chemical bonds. In the 1950s, this idea stimulated enthusiasm for discovering the genetic molecule. In retrospect, it could be seen as having been a well-reasoned theoretical prediction of what biologists should have been looking for during their search for the genetic material.