As some of you already know, Seblod announced their Dynamic Cascading Field last month and made it available on the store. I've been playing around with it and it is incredible.
I've posted a short video which demonstrates how to use it's basic functionality for anyone who's interested:
Joomleb - based on feedback I received it wasn't viable to continue the book. I've decided to spend more time on making more videos for free, instead of writing a paid ebook.