Gustav Keckeis became head of the Herder publishing house in Freiburg im Breisgau. After the National Socialists came to power, he moved to Zurich and in 1935 took over the management of the Benziger publishing house. From 1939 to 1941 Keckeis was President of the Swiss Booksellers and Publishers Association. Keckeis was also an author under the pen name Johannes Muron. More information: Wikipedia
See above.
Initially trained as a bricklayer and architect, after serving in World War I Karl Bauer retrained as a bookseller and in 1926 joined the Callwey publishing house. He took control of the publishing house in 1930 following the death of Georg Callwey and went on to take seats in the German Publishers and Booksellers Association as well as the Booksellers Association. During the denazification, Baur was temporarily banned from working in the book industry but later re-established the Callwey publishing house, handing control to his wife and son in 1976. More information: Wikipedia Booklooker
Sir Stanley Unwin founded Allen & Unwin after buying a controlling interest in the firm George Allen and Sons in 1914. Unwin’s son, Rayner S. Unwin, and nephew, Philip, helped run the company, which published the works of Bertrand Russell, Arthur Waley, Roald Dahl, Lancelot Hogben, and Thor Heyerdahl. It became well known as J. R. R. Tolkien’s publisher, publishing The Hobbit in 1937, and its sequel The Lord of the Rings in 1954–1955. At the age of seventy–six he appeared as a witness for the defence in the Lady Chatterley trial in 1960. More information: Wikipedia
Alongside his brother, Paul, Théophile Zech–Levie was a director of the printer and publishing house Zech et Fils previously known as the Imprimerie Lelong. The publishing house, created in 1785, specialized in religious and scientific works which were exported across Europe. The Zech family took control of the publishing house in 1883. Théophile was a co–founder of the Syndicat des Editeurs Belges in 1935 (now the Association des Editeurs Belges: ADEB) alongside Ernest Vandevelde (see Emile Bruylant above).
Louis Hachette was the grandson of Louis Christophe François Hachette, founder of the Hachette bookshop. He was the son of Georges Hachette, who alongside his brother, Alfred, Louis Bréton and Emile Templier, inherited Hachette after its founder’s passing. Louis joined the company in 1893 and became an associate in 1898, and mainly dealt with illustrated books for children. He became President of the Cercle de la Librairie in 1914 and seems to have remained active during the war years, alongside René Fouret, to keep Hachette active. In 1917 he played a key role in the National Book Congress organized by the Cercle de la Librairie. He presided over the first International Publishers Congress after World War I in 1931 and continued contributing to the Congress until his last Congress in 1938. More information: Institut Memoires de l’édition contemporaine.
Ove Vilhelm Tryde was born in Copenhagen and from 1894-97 worked at bookstores in Berlin, Paris and London, thereby consolidating his excellent language skills. In 1897 he joined his father’s bookshop, becoming a co-owner in 1901 co-owner, and the sole owner from 1913 until the company’s cessation in 1938. From 1909 he was a delegate at the International Publishers Congress, and he played a role in the reconstruction of the Congress after the First World War. He continued to be involved in publishing after World War II chairing the Danish Booksellers’ Association and writing articles about the book trade. He also wrote the history of the International Congress 1913-31, contributing a number of photographs, which was published independently in 1947. More information: https://biografiskleksikon.lex.dk/Ove_Tryde
Viktor Ranschburg studied the book trade at Baer & Co. in Frankfurt for four years before moving back to Budapest. In 1901, he represented the Hungarian book trade at the Leipzig International Publishing Congress as the general secretary of the Association of Hungarian Book Dealers. He held the positions of secretary and then general secretary of the Association of Hungarian Publishers and Book Dealers, and from 1906 to 1919 he was the vice–president. More information: Wikimedia Wikipedia
W. P. van Stockum Jr. entered the family publishing and bookselling business at 15 years old. After leaving the company he dedicated his time to a number of activities including the preparation of a book on 4 centuries of publishing in the Netherlands (La librairie, l’imprimerie et la presse en Hollande à travers quatre siècles) for the International Publishers Congress in Amsterdam in 1910, which he presided over.