[2] The Biological and Environmental Sciences Library was formerly part of the system but in 2009 it closed permanently.

Bostock Library, named for board of trustees member Roy J. Bostock, opened in the fall of 2005 as part of the University's strategic plan to supplement Duke's libraries.

It contains 87 study carrels, 517 seats, and 96 computer stations, as well as 72,996 feet (22,249 m) of shelving for overflow books from Perkins Library as well as for new collections.

The library was named after board of trustees member and alumnus David M. Rubenstein in 2011.

The library is the host institution for the Religion in North Carolina Digitization project, a collaborative digitization project with Wake Forest University and the University of North Carolina at Chapel Hill.