curl hacker Daniel Stenberg has announced that his online booklet, HTTP/3 Explained, is available for download from GitHub. The booklet will remain a work in progress as neither the protocol specifications themselves nor any working implmementation are even remotely ready at this moment.
The book describes what HTTP/3 and its underlying transport protocol QUIC are, why they exist, what features they have and how they work. The book is meant to be readable and understandable for most people with a rudimentary level of network knowledge or better.
These protocols are not done yet, there aren't even any implementation of these protocols in the main browsers yet! The book will be updated and extended along the way when things change, implementations mature and the protocols settle.
Earlier on SN:
The Next Version of HTTP Won't be Using TCP (2018)
Google Touts QUIC Protocol (2015)
(Score: 3, Informative) by sorokin on Wednesday November 28 2018, @09:07AM
Frankly, I didn't find the booklet very informative.
If anyone is interested, below are the links that describe the motivation and details very well. At least they work for me.
https://www.slideshare.net/apnic/a-new-internet-intro-to-http2-quic-doh-and-dns-over-quic [slideshare.net]
https://blog.cloudflare.com/the-road-to-quic/ [cloudflare.com]