Yeah! It is early days but I'm working on a new book that I plan to release before June. It is a small introductory book about decentralisation protocols. Each section is an introduction to a protocol followed by a hands-on project building a little protocol-specific project using JS.
You can follow it at: https://leanpub.com/four-decentralisation-protocols
I'm licensing the book using Creative Commons but I'll be selling it both in Leanpub and on my website because this is my work and I need to make a living. :-)
And since I let you all waiting for too long, here is a mockup: