The University Bookshop operates at the Waigani Campus and at the Madang Open Campus. The Bookshop sells textbooks, reference books,and stationery to students, staff, academic institutions, and the general community. It also provides publishing services through UPNG Press, and markets other publishers' products.

The Bookshop also acts as an agent for other publishers and wholesalers and has around 5,000 titles available in all disciplines that ate offered at the University.