The Catania Astrophysical Observatory Library holds about 12800 books, mostly astrophysical and astronomical publications, with a wide section of general physics and mathematics.
There is also an outreach-education section which has recently been enriched by astronomy books for children and young people.
The library has a historical collection containing 234 volumes published from 1718 to 1899. It has holdings of about 610 national and international serials, both print and electronic journals (including 136 current titles), specialized in physical and astronomical sciences, mathematics, computer science and earth sciences.
Access to the bibliographic heritage is allowed to professors and research staff, scholars from all over the world, students or keen amateur astronomers.