I’m a bit of a miser when it comes to books; I haven’t made the switch from physical books to digital ones, and I don’t think I will any time soon. Partly, it’s because I get all my books from the library.
While the public library has its own search web site, it lacks the recommendations capabilities of sites like Amazon, or Goodreads. To make it easier to find the books I want, I wrote an extension that lets me select some text in a browser, and search for it in my public library:
It works from any web page, and is now available as both a Chrome extension, and a Safari one. (Firefox coming soon).