Here is a collection of the latest official drafts for the various parts and components of QUIC and HTTP/3.

Invariants

​Version-Independent Properties of QUIC​

Transport

​QUIC: A UDP-Based Multiplexed and Secure Transport​

Recovery

​QUIC Loss Detection and Congestion Control​

TLS

​Using TLS to Secure QUIC​

HTTP

​Hypertext Transfer Protocol Version 3 (HTTP/3)​

QPACK

​QPACK: Header Compression for HTTP/3​