To find materials in Ares, search by department or instructor and then select your course. Each course site is password-protected. Ask your instructor for the password for that course.
Physical course reserves (i.e., books, print materials, DVDs) have a call number and are listed in the Libraries' catalog. You can search by the course number or instructor's name.
Most items for German and Comparative Literature will be located in Olin Library. Go to Olin Library's Help Desk to request an item on reserve.