This is an aspect of something which I wish would be more acknowledged and investigated:

>How can the electronic representation of books be made more rich and featureful?

Some notable examples:

- https://mathcs.clarku.edu/~djoyce/java/elements/elements.htm...

- https://www.motionmountain.net/

- The Elements by Theodore Gray https://apps.apple.com/us/app/the-elements-by-theodore-gray/...

- the "Living Books" series: https://wanderfulstorybooks.com/

Unfortunately vanished (anyone have an archive? was the wonderful _Bembo's Zoo_ https://www.devicq.com/bembo-zoo/ and https://engagetheirminds.com/2012/04/05/bembos-zoo/

I'd be very glad of other examples.