Purpose The purpose of this case study is to document the process of building a collection of works around transgender life-writing, following the identification of a significant gap in the existing collections. Design/methodology/approach This case study describes and evaluates a collection development project undertaken at Senate House Library, University of London. After evaluating four comparable case studies, guidelines were developed for acquisitions to the collection, based on subject, conservation needs and financial expense. Findings Twenty items were selected for the collection, dating from 1933 to 2015, including books and magazines in multiple languages. The items acquired for the collection push back against the genre’s traditional preoccupation with transition. Writers describe their experiences as a racing driver and fighter pilot (Roberta Cowell), an NGO director (A. Revathi), a Buddhist monk (Michael Dillon), a professional tennis player and ophthalmologist (Renée Richards), and a travel writer, journalist and mountaineer (Jan Morris). Research limitations/implications Challenges included setting the scope of the collection, and questions around the cataloguing and arrangement of materials. Practical implications Items acquired for the collection entered the library separately and were processed individually by the library’s cataloguing team as they arrived. Several issues arose during this stage of the project. Social implications To serve the needs of library users effectively, it is necessary to analyse the imbalances in collections as a routine practice. Originality/value The case study is original in focusing on a comparably small project with larger implications for the user experience and inclusivity of a library and its collections.