He gradually learnt English using dictionaries, and published many articles in Palestinian newspapers as well as several short stories in 1938. As time progressed, he found himself leaning closer towards books of literature and poetry and his fascination in history developed. He returned in 1939 to Al Rafeed where he continued working in the field of education before becoming an employee in the Iraq Petroleum Company in Mafraq. In 1943 he fulfilled a substantial commitment and married "Georgette Nuseir" whom he had met on a visit to Nazareth. Mousa spent fifteen years in Mafraq and his publications were put close to a halt due to the inappropriate and illiterate environment he went through although he managed to publish a few short stories, articles and translations. A major transformation in his life occurred when Mousa moved to Amman, the Jordanian capital, and began working in the "Jordanian Broadcasting Company" in 1957, turning to the work of the publications service and the "Ministry of Information and Culture" until 1984. During that period, he was the editor of the Jordanian magazine "‘Resalat Al Ordon’" (1966 to 1967). Later on, Suleiman Mousa spent more than four years as a cultural adviser in the Greater Amman Municipality (GAM), from 1984 to 1988. Mousa's first book "Al Hussein Bin Ali and the Great Arab Revolt" was published in 1957 where it was written when the author had been resident of Jaffa, Palestine in early 1939, when he was a mere nineteen years of age. The printing of this book occurred after nearly seventeen years of its writing. One of the most prominent works of Suleiman Mousa is "", which has been translated into English, French and Japanese. This was a turning point for the author Mousa that has taken him to world fame. He showed the Arab's point of view about battles and events of The Great Arab Revolt, and also came in response to the British book written by Lawrence himself, who did not give the Arabs their right to the full extent. The author shows that Arabs fought in large numbers in the combat revolt against the Turkish rule for independence and freedom, and that they are the ones who fought and struggled, while Lawrence was merely an officer like any other in the British Army. While the author was resident of Jaffa in 1937, his activities were expanded to English as well as Arabic history books and he purchased several books in English of which most important were "The Seven Pillars of Wisdom" by Lawrence and "The Arab Awakening", by George Antonius, which emerged in its first edition in 1938.