An online source on the library of the 17th-century virtuoso Robert Hooke (1635-1703). It is an on-going collaboration between three scholars who are currently undertaking research on different aspects of Hooke’s work. Hooke’s activities as a book collector, with assessments of the Bibliotheca Hookiana (London, 1703), the auction catalogue prepared after his death, and the annotations in the books extant from his library. A searchable transcription of the Bibliotheca Hookiana (London, 1703) plus a list of other books that have been attributed to Hooke via his annotations but that are not listed in the auction catalogue.