The Post Library houses a non-circulating reference collection. Although this restriction may be an inconvenience to some patrons, the books are always available to anyone who wishes to do research. Library materials may be photocopied. A small portion of the collection comprises rare books owned by Dr. & Mrs. Post. The other books have been purchased since the library opened. In addition, the library subscribes to about thirty art-related periodicals.
The Post collection concentrates on the history of art rather than on techniques for creating art. It covers all the visual media, such as painting, drawing, stained glass, print-making, and sculpture. It also encompasses related fields–gardening, calligraphy, antiques and archaeology. The photography section is especially popular with the library’s patrons.