Agassiz’s personal library and the purchase of the books of Laurent Guillaume de Koninck, a noted Belgian paleontologist, formed the core of the early collection. By the end of 1861, the Library held 6,000 volumes. Currently, the Library collection holds more than 300,000 volumes of monographs and journals alongside a collection of natural history art and the Museum of Comparative Zoology archives. Serial and monograph publications are received from all over the world through exchanges.
The continuing interest of friends and scholars in the maintenance of a specialized and convenient museum library has made it a strong and unique resource for learning.