The SIDIC Book collection contains approximately 6 thousand volumes which have been accrued over the past number of years. They are mainly in English, French, Italian, German and Hebrew. The biblical, talmudic and midrashic sources are also available in the original language.

In July 2002 the 6,000 books of the SIDIC library were donated by the Sisters of Sion to the Gregorian University. It was a significant time to move the SIDIC library since the Gregorian University just opened an Institute for the Study of Religions and Cultures, offering a Master's degree in interreligious dialogue and in particular a focus on Judaic Studies.

Thus, the new Institute which will include the Cardinal Bea Center for Judaic Studies, together with the SIDIC library collection, is in a position to provide superior resources to those engaged in Jewish-Christian Dialogue. The Gerhart Riegner Memorial Fund was established to support the growth of the SIDIC library at the Gregorian University.