Her first collection of poems Kontralte (In Contralto), was published by Stafeto in 1955. Further poetry collections followed: Kvarpieda kamarado (Four-footed friend), Cent ĝojkantoj (One hundred songs of joy), and Eroj (Bits and pieces), in 1956, 1957, and 1959 respectively.
In 1960 (and again in 1980), Keegan Paul published Boulton's English language biography Zamenhof, Creator of Esperanto, the Esperanto editon of which appeared in 1962. Two short story collections have apeared in book form: Dek du piedetoj (Twelve little feet) and Okuloj (Eyes), in 1964 and 1967 respectively. In collaboration with William Auld, she produced Rimleteroj (Rhyming letters), which was published in 1964.
The writing of Marjorie Boulton is mature, socially engaged and infused with warmth, sincerity and a profound humanism. A knack for finding the appropriate word or form of expression is evident throughout. Her work is multi-faceted. She displays a keen sense of humour and at the same time is not afraid to reveal her own private passions and torments.