18 books • 8 series
Book #4: The Historical Development of Quantum Theory
Book #1: The Quantum Theory of Planck, Einstein, Bohr and Sommerfeld: Its Foundation and the Rise of Its Difficulties 1900–1925
Book #5: Part 1 Schrodinger in Vienna and Zurich 1887 1925
Book #2: The Discovery of Quantum Mechanics 1925
Book #3: The Formulation of Matrix Mechanics and Its Modifications 1925–1926
Book #6: The Completion of Quantum Mechanics