The application of Planck's and Einstein's concepts regarding the quantum exchange of effects between emitters and fields, as well as the discontinuous structure of electromagnetic waves (photons), to biological problems was, in 1922, an idea that seemed too bold, even fantastic, to many. However, now, after just 30 years, it has become a significant branch of biophysics. The number of quantum biological publications runs into the thousands, with more and more researchers and institutes engaging in this field, yet there remains the impression that despite all the results achieved, we are still at the beginning. The author of this book was expelled from his research area in 1933 due to the rise of National Socialism. After World War II, when order and peaceful international research returned, he found with joy and gratitude that despite everything...