The Google Map above can be accessed at https://goo.gl/maps/N2j1VwfP7xqNmYKw5. In the image below, you can park your car without a University permit in the parking lot marked in green, and the book swap is in the field marked in orange.
From Walton Way main entrance at Fleming Ave: Go 3 quarters of the way around the circle. The building immediately in front of you is University Hall. Go east (to your right). The road will bend to the south (right). Continue past the Reese Library and turn right into the Jaguar Student Activities Center parking lot on your left. Follow the green line in the image below.