The English Short Title Catalogue (ESTC) is a union short-title catalogue of works published between 1473 and 1800, in Britain and its former colonies, notably those in North America, and primarily in English, drawing on the collections of the British Library and other libraries in Britain and around the world.[1] It is co-managed by the British Library and the Center for Bibliographical Studies and Research (CBSR) at the University of California, Riverside.[2] The database is freely searchable. In October 2023, the database went offline, along with the broader digital infrastructure of the British Library, due to a ransomware cyberattack.[3] A temporary version of the pre-1700 ESTC, derived from data captured in 2014, is hosted at https://estc.printprobability.org/. As of January 2024, the Print Probability data also includes limited post-1700 ESTC entries.