The Eth2 Book is a comprehensive technical handbook that delves into Ethereum's transition to proof of stake and the future advancements that lie ahead. Also known as Upgrading Ethereum, this ongoing project is a testament to the dedication and meticulousness required for such a transformative endeavor. While the book is a work in progress, it offers valuable insights and knowledge for those interested in Ethereum's evolution.

The book is organized into different editions, each named after Ethereum's consensus layer upgrades. The current edition, Edition 0. 3: Capella, is being actively developed.

However, you can also explore the earlier editions, such as Edition 0. 2: Bellatrix and Edition 0. 1: Altair, to trace the protocol's evolutionary path.

For convenience, a PDF version of the book is available, and you can find the latest version at https://eth2book. info/latest/. The source material and tools necessary to build the site and the PDF can be accessed on GitHub.

Additionally, if you appreciate the author's work and would like to show support, you may consider sending a cup of coffee or a donation. Donations are not expected but are greatly appreciated and serve as encouragement for further progress. The author's account information for donations can be found below.

In summary, The Eth2 Book is a valuable resource for anyone interested in understanding and keeping up with Ethereum's journey towards proof of stake and the exciting developments on the horizon