There are bookdrops:

• on the Evans Library concourse,
  
• across the street from the Weisenbaker Engineering Research Center (WERC) on Bizzell St.,
  
• across the street from the Sbisa Dining Hall on Houston St.,
  
• near the Blocker building and the Engineering/Physics Lab building near Parking Area 7, and
  
• near the public parking area behind the West Campus Library.