This is a book that was in contract to be published but the publisher pulled out, so we are going to try to self publish it (never done this before, we'll see how it goes.)
It is in somewhat rough shape because we are redoing the book with a more conceptual bend than the publisher wanted: there are some repetitive sections due to re-arranging, typos and areas that need to be expanded, but the rough outline is about what we want and much of the content is pretty solid.
The book looks at hypermedia conceptually, then htmx for hypermedia-driven web applications, then HyperView for hypermedia-driven mobile applications.
We the authors all agreed to keep the online version available for free forever.
Hope people find it useful and interesting.