Because the University and City Library Cologne was targeted by a cyber attack, we had to shut down our servers for maintenence. This is a security measure. Please note that neither our library’s website ub.uni-koeln.de nor the literature search USB-portal are currently working. Books stored in our magazine cubus are currently not available for new orders. However, it is possible to borrow books from the self-check-out area where we store all books we bought in the last 20 years. Also the textbook collection on the ground floor is accessible for lending. Our main library building is open mondays to fridays from 9 to 18 o’clock. Please note that due to the mailserver shutdown, we’re unable to send e-mails to you. In case you are waiting for a response, please make sure to leave a number where we can call you back. We automatically raised the date of your book return to June 30. However, you can also return your books during our service hours. If you have any questions, we will be glad to help you in the comments.