Upgrading Ethereum

A technical handbook on Ethereum’s move to proof of stake and beyond

Aka “The Eth2 Book”.

This is a work in progress. It is not a small project, and will take some time to complete. I appreciate your patience.

Read the Book


Editions follow the naming of Ethereum consensus layer upgrades:

The latest version is always at https://eth2book.info/latest/. It currently points to the Capella edition. Earlier editions are now frozen as-is, but are of historical interest as the protocol continues to change.

A PDF version is available.

The source material and everything needed to build the site and the PDF is available on GitHub.


Kind souls sometimes ask for a way to send me a cup of coffee or make a donation. My account info is below - donations are absolutely not expected or necessary, but are always very encouraging and gratefully received.

Any whales or large treasuries out there, I encourage you to take a look at the Protocol Guild which supports the people developing and maintaining our incredible technology, not just writing about it.