The Bentley Rare Book Gallery has a collection of approximately 8,000 pieces illustrating the diversity of the written and printed word in the English-speaking world. These materials support the work of students, faculty, and researchers and are used in instruction sessions for Kennesaw State University classes as well as community groups.
- Two Sumerian clay tablets dating from approximately 2000 BCE.
- A teaching collection of more than 30 medieval manuscript leaves, including fragments of liturgical books and works by Peter Abelard and Peter Lombard.
- Five books printed in the fifty years following the invention of printing (ca. 1450), known as incunabula. The earliest printed book in the collection is an edition of Petrarch's poems that was printed in Padua in 1472.
- Early editions of Geoffrey Chaucer's works printed in 1542, 1561, 1598, and 1687, as well as examples of later editions printed and designed by such notable figures as William Morris, Bruce Rogers, Rockwell Kent, and Victor Hammer.
- The Fourth Folio of William Shakespeare's works (1685) and several sections of the Second Folio (1632).
- Modern fine press books, including William Morris' Earthly Paradise and Sire Degrevaunt, and several leaves from the Kelmscott Chaucer. The collection contains a growing number of early twentieth-century American fine press books, especially those designed by Bruce Rogers and D.B. Updike.
- A large collection of nineteenth- and twentieth-century American and British authors, including Mark Twain and Charles Dickens. Dickens' novels Bleak House and Nicholas Nickleby are held in their original serialized parts.
- Artifacts from the Apollo 14 and Apollo 16 space missions, including a Lunar Bible, consisting of a microfilm Bible taken to the Moon by Edgar Mitchell on Apollo 14 and a Lunar Modual Contingency Manual and Lunar Countour Map used by Charles Duke on Apollo 16.