You can renew items by going to www.hugo.hu.nl. Log in with your HU-account.
Go to HUGO and look for the item you wish to reserve.
Click the button 'Reserve', log in with your HU-account ('Reserveren' in the Dutch interface).
You will receive an email as soon as the title is available on the chosen location.
During the summer closure of HU Bibliotheek Amersfoort some reservations can only be granted on or after August 27. Keep this in mind.
Should you need more help please contact the library.