In Spring 2018, Altmetric launched Altmetric for Books.
"For academic journal articles Altmetric badges are a widely used and well understood measurement of impact. Historically, due to both complexities in the data and differences in the way audiences engage with the content, it has been more difficult to provide the same kind of insights into the impact of books and book chapters... Now, Altmetric Badges for Books are on the same journey to becoming a broadly adopted indicator of engagement and dissemination." (Altmetric, "Are your readers who you expect? Altmetric Badges for Books," Research Information, May 31, 2018)