The Johannes Zimmermann library of ACI is a reference library that serves the Institute’s academic and pastoral programmes and its research projects. It is also open to visiting academics and students, Christian workers and others interested in researching in its areas of specialisation.

The library specialises in mission history and the history and theology of the church in the non-Western world generally, with a particular interest in the church in Africa and especially Ghana. Holdings include a collection of writings in Ghanaian languages dating from the mid-19th century, as well as studies in history, religion and culture. Inter-religious engagement is a further area of specialisation with a recently acquired up-to-date PhD level collection in Islamic studies. Modern biblical, theological and pastoral literature for the benefit of Christian workers is also available. A notable feature is the growing collection of journals from around the world, which gives access to the latest Christian thought and practice in mission. Library holdings (now over 20,000 books) are computerised.

The ACI library provides services for outsiders as well. They are charged for such services. However, our sister institutions such as PCE, Trinity Theological Seminary, Good News Theological Seminary, University of Ghana, Legon, and Ghana Christian University Collage do not pay library user fees. They will be charged for photocopies, Internet services. They cannot be allowed to borrow books.

As the Institute is expanding and its student population is growing, a new, purpose built library building is under construction. This will be a three-storey building with extended basement, comprising a reference/periodicals floor, with additional exhibition/lecture room, a main holdings/reading room/study carrels floor and an archive/audio-visual floor. Library offices will also be provided on each floor.