I own and have read numerous books about quantum electrodynamics and also classical EM. But sadly, I have yet to find a good book that describes how EM generates photon-based radiation. E.g. the process by which a radio wave comes into existence -- at a deeper level -- not just Maxwell, Abraham-Lorentz, Dirac, etc., but the real physics of the process. Has anyone here come across such a book? Many thanks!