Hello.. I'm writing a popularization book about quantum mechanics. I know most books start with ultraviolet catastrophe, Planck discovery of the constant.. and the double slit experiment. Is there other ways to start it without mentioning the double slit? Or is it essential to any laymen based quantum mechanics introduction book that there are just no other alternatives? How about you. If you were to write a QM book for laymen and popularization. How would you start it and what ideas would you put first? Thank you!