The archive library's stock grows by around 6-8 meters of shelving every year. The selection of publications acquired by purchase is usually based on advertisements, literature references and reviews in daily newspapers, specialist journals and monographs as well as publishers' and antiquarian catalogs. User requests are also taken into account. Purchases are made via local bookshops, out-of-print books are obtained from antiquarian bookshops.
"Gray literature" (not published in bookstores) usually has to be ordered directly from the author or the publishing institution.
Not insignificant are the additions through donations and bequests from private individuals and institutions.
Between 1950 and 1975, the StadtBibliothek handed over to the archive all literature that was to be withdrawn from circulation due to its historical value or for conservation reasons. This meant that the rare old holdings of the Homburgensien and the Hesse-Nassau department in particular were transferred to the archive library.
In the course of cooperation with archives, museums, historical societies, etc., the city archive receives numerous media through the exchange of documents. Research in the city archive often leads to the publication of archive material. In this case, there is an obligation to provide a specimen copy.