This document provides guidance on how to use the Peeragogy Handbook. It is a practical guide for online co-learning and self-organized peer learning (peeragogy). Readers can hop around and do not need to read sequentially. Short videos introduce articles. It is a living document where readers can comment and suggest changes. The handbook provides conceptual information for getting started, as well as resources, assessments, and use cases toward the end. It also links to supporting literature on learning theories related to peer learning.