“His writing is also clear, to be sure … . No doubt this novel interpretation will be carefully scrutinized by experts in the near future, as it clearly involves an interesting new twist on how quantum mechanics arose, in particular a new view of the immediate events that led up to Heisenberg’s breakthrough.” (David Rowe, NTM, Vol. 29 (3), September, 2021)“This book provides an original contribution to the study of the history of quantum mechanics. … The monograph is carefully written and logically organised, it further provides valuable insights based on a rich historical documentation.” (Bassano Vacchini, zbMATH 1428.81004, 2020)