Introduction Patrick Charbonneau, Michelle Frank, Margriet van der Heijden and Daniela Monaldi; 1. The spectrum of He+ as a proving ground for Bohr's Model of the atom: a legacy of Williamina Fleming's astrophysical discovery Maria McEachern and Bretislav Friedrich; 2. H. Johanna van Leeuwen: the other scientist behind the Bohr-Van Leeuwen theorem Miriam Blaauboer and Margriet van der Heijden; 3. Hertha Sponer, Maven of quantum spectroscopy Elise Crull; 4. Angular and career momentum: what Lucy Mensing contributed to physics and why she left the field Gernot Münster and Michel Janssen; 5. Discouraging Jane: Dewey among the lucky generation of US physicists Adriana Minor; 6. Laura Chalk and the stark effect Daniela Monaldi; 7. Elizabeth Monroe Boggs: from quantum chemistry to the Manhattan project Patrick Charbonneau; 8. Excelsior! John Wheeler, Katharine Way, and the role of women in the exploration of the microcosm Stefano Furlan; 9. Sonja Ashauer from São Paulo to Cambridge: a journey to quantum electrodynamics Barbra Miguele and Ivã Gurgel; 10. Untangling entanglement history: early quantum contributions of Chien-Shiung Wu Michelle Frank; 11. From quantum physics to ethics: Grete Hermann on Heisenberg's Cut Andrea Reichenberger; 12. Women take the lead: a physics laboratory under the dictatorship in Portugal, 1940s-1960s Ana Simões and Maria Paula Diogo; 13. Carolyn Parker's electronic frequencies Charnell Chasten Long; 14. The Chew-Low-Salzman method and Freda Friedman Salzman: a physicist between nuclear and social interactions Jens Salomon; 15. Out of the ivory tower: Maria Lluïsa Canut and X-ray crystallography Marta Jordi Taltavull; 16. Ana María Cetto Kramis: light in quantum mechanics and open science Mar Rivera Colomer; Index.