If you give this the URL for a tapestry that contains books with a publicly accessible text version in the Internet Archive, this little app will download the text of those books (the whole book, not just what's shown in the tapestry) and make a wordcloud out of it. This isn't very fast – JavaScript isn't the best language for text processing! – but it's meant to be a demo of what could be done with tapestries and the Internet Archive API.
(It also attempts to figure out the grade level for the texts, though these numbers seem suspicious. There's also sentiment analysis being done on the text: positive numbers are positive, negative are negative, who knows if they mean very much.)
Try this one: https://tapestryviewer.netlify.app/tapestry/melville-tapestry