The Scythe Complete Rulebook (hardcover version) is a 136-page compilation of all Scythe rules and clarifications.
In addition to compiling all Scythe rules in one place (including, for example, all of the mech abilities on consecutive pages, while still providing spoiler warnings when applicable, as well as all Automa content), this rulebook also includes frequently asked questions and answers on a card-by-card basis. This isn’t just a rulebook–it’s the internet of Scythe, all in one place.
A spiralbound version is also being printed. A low-res, black-and-white is available for free to download here (there is a robust index in the printed version, but searching a PDF is handy as well).