This series is composed of 792 annotated books, 144 annotated reprints and off-prints, about 180 annotated journal volumes, which were amassed by Wilfrid Sellars from the 1930s through the 1980s. This series also contains a set of off-prints and books written and retained by Sellars himself. The books and offprints are arranged alphabetically by author and title, while the journals are arranged by journal title and then chronologically by issue. The library contains material spanning the whole of Sellars' career. The topics covered reflect Sellars' professional concerns and therefore contain works on a wide variety of philosophical topics, but emphasize works on logic, epistemology, ontology, scientific realism, philosophy of science, ancient Greek philosophy, and the history of philosophy. Many of these works contain either annotations or dedications. The annotations include notes in the margins of the documents, underlining, and logical notations. The degree and kind of annotation vary greatly; some items are heavily underlined, annotated, and logically notated. Others have only short sections that are heavily marked, or are lightly marked throughout.
A large portion of the library was deaccessioned; the deaccessioned materials include books, journals, and reprints that were not philosophical in nature and lacked any unique markings such as annotations or dedications. These items covered a broad spectrum of Sellars' personal interests and ranged from sports to crosswords, nature, cooking, politics, biographies, history, religion, art, and works of fiction. There is a comprehensive list of all the books initially contained in Sellars's library available for researchers upon request. There is also a list of journal titles found in the Sellars's library.