The William Andrews Clark Memorial Library is a rare books and manuscripts collection, with particular strengths in English literature and history (1641–1800), Oscar Wilde, and fine printing. Though the majority of the Clark's collections are focused on Great Britain, the library still maintains significant Los Angeles-related collections.

The Boeckmann Center for Iberian and Latin American Studies was founded in 1985 with a donation of an 80,000 volume book collection related mainly to the study of Spain, Portugal and Latin America. However, this first donation also included books and pamphlets related to Alta and Baja California, the U.S. Hispanic Southwest, the U.S.-Mexico border region, and a small collection of early 20th…