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Impact: Library Tools for Promotion and Tenure
Web of Science and Scopus traditionally focused on analyzing citations found in journal articles, but both sources have begun to include books. Web of Science, through a subset database called Book Citation Index and Scopus through its existing database. Google Scholar will also point to citations to books. Below is a list of sources to help you document books and book chapter impact.
You can also download the Altmetric.com bookmarklet to find altmetrics for any book on a web page that includes a DOI (but many books do not have DOIs). Some may also offer downloads/views information though this is usually restricted to viewing by the author through a portal.