Book of Blocks 0.8.91 [1.20.1] is a release file of the Minecraft mod Book of Blocks- Fabric for Fabric, made for Minecraft 1.20.1, 1.20, 1.20-Snapshot. It was published on November 30, 2023 and is 1.6 MB in size. For the full description, screenshots and every other version, visit the Book of Blocks- Fabric mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.