Find the right staff member for any concern you may have. In some cases, there is a distinction between staff at the Holzstraße location and at the Campus location.

Of course, you can always use the general contact information for all your concerns:
bibliothek.campus (at) hs-mainz.de,
T +49 6131 628-6220 for the Campus location and

bibliothek.holzstrasse (at) hs-mainz.de,
T +49 6131 628-6221 for the Holzstraße location.

You will then be forwarded to the right staff member to assist you.