The Ruth Mortimer Frankenstein Collection contains 23 items, including audio and video cassettes, sale catalogs, craft books, ephemera, and computer software. The collection spans the years 1824-1993, with the majority of items dating from 1979-1993. The material was collected by Ruth Mortimer and was presented to the Mortimer Rare Book Room, in her memory, by John Lancaster in 1994. Mortimer also collected 52 editions of Frankenstein, in 60 volumes, and 43 secondary source titles in 48 volumes. These materials were presented to the Mortimer Rare Book Room at the same time as this collection, and are cataloged separately.

This collection is organized into six series:

• I. Cassettes, Audio and Visual, 1979-1993
• II. Catalogs
• III. Craft Books, 1978-1983
• IV. Ephemera, 1824-1993
• V. Software, 1992-1993
• VI. Oversize, 1824-1979