I LOVE the hover effects for the book covers on this site which is also a great example of someone collecting highlights/annotations of the books they read and hosting them in public on their personal website.

Melanie has written about the CSS part of the hover effect here: https://melanie-richards.com/blog/highlights-minisite/ and like all awesome things, she's got the site open at https://github.com/melanierichards/highlights. I may have to do some serious digging for figuring out how she's creating the .svg images for the covers though.

European Bureau of Libraries in Europe Public libraries- statistics