In 1954, at the age of 23, John Stevenson arrived for a sojourn in Paris, where he socialized with the expatriate community behind the modernist
literary magazine Merlin. He soon became the business manager for Merlin. As the magazine was not well known to the public, the job consisted mostly of selling copies on the street.
Marcus van Heller pen name The main editor of
Merlin,
Alexander Trocchi, used to write erotic fiction for
Olympia Press publisher to supplement his meagre income and suggested to Stevenson to do the same. Olympia Press specialised in books which could not be published (without legal action) in the English-speaking world, making use of the fact that the French were more sexually tolerant and few were able to read in English. The books were aimed at the English-speaking travellers and the British and American servicemen stationed in Europe in the wake of the Second World War. The first erotic novel written by John Stevenson,
Rape (1955), surprised
Maurice Girodias (the founder of Olympia Press), who described it as "almost too brutal". The book was published under the pseudonym Marcus van Heller, a pen name which Stevenson continued to use for the subsequent novels, making it one of the most famous brand names published at Olympia Press. The success of the first novel was followed by other books, written in the years 1955–1961, making Stevenson the most prolific writer for the "Traveller's Companion" series of this publisher. The second novel,
The Loins of Amon (1955), was set in Ancient Egypt, marking the beginning of a specialisation in erotica with grand historical settings. The elaboration of the story was based on his schooling in ancient history, supplemented by research at the British Council Library from Paris. In a few years, Marcus van Heller became the most prolific and mysterious pen name from the "Traveller's Companion" series. "In the netherworld of erotica, the name Marcus van Heller approaches the stature of legend" (portrayal by John de St. Jorre in his book about the history of Olympia Press). At one point, John Stevenson and Alexander Trocchi found out that Maurice Girodias reprinted their works under another imprint, Ophelia Press, to avoid giving them more money. This fact and also a negative remark from Girodias regarding the effort he put into writing his most recent novel determined Stevenson to end the collaboration with Olympia Press and return to Britain in 1961. Afterwards, Girodias used the fact that the real identity behind the pen name Marcus van Haller was largely unknown, commissioning other writers to publish new novels under this pen name. ==Personal life and death==