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Knowlogy BookMinecraft mod for 1.21.4

An expandable wiki-like book with documentation about the game, inspired by the knowledge book, powered by lavender.

client and servernewest supported release 1.21.4UtilityLibrary
Latest version
fabric-1.21.1-0.9.1
Minecraft
1.21 to 1.21.4
Java
Java 21+
Loaders
NeoForge, Fabric
Licence
GPL-3.0-only
Downloads
570.6k
Updated
16 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Knowlogy Book servers

One click and Knowlogy Book is installed with the right loader, on hardware built for it.

  • 1.21.4
  • NeoForge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Knowlogy Book declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.4NeoForge, Fabric21+declared3 Dec 2024
1.21.3Fabric, NeoForge21+declared23 Oct 2024
1.21.2NeoForge, Fabric21+declared22 Oct 2024
1.21.1NeoForge, Fabric21+declared8 Aug 2024
1.21Fabric, NeoForge21+declared13 Jun 2024

Download

From Knowlogy Book’s own host. Nothing is re-hosted here.

Browse 30 indexed releases

For Minecraft 1.21.4

Choose the loader you use before downloading.

  • Fabric

    fabric-1.21.4-0.9.1 · 9 Jul 2025 · knowlogy-fabric-0.9.1-1.21.4.jar

    Get Fabric

Most recently published release

fabric-1.21.1-0.9.1release9 Jul 2025

knowlogy-fabric-0.9.1-1.21.1.jar · 5.8 MB · for 1.21.1, 1.21 · Fabric

Download this release
1c78177778f6…
Older versions24
  • fabric-1.21.4-0.9.19 Jul 20251.21.45.8 MB571 downloads25521a570774…Get
  • fabric-1.21.3-0.9.19 Jul 20251.21.3, 1.21.25.8 MB189 downloadse85d27919843…Get
  • neoforge-1.21.1-0.9.19 Jul 20251.21.1, 1.215.8 MB52.0k downloadsdbd70abe1b99…Get
  • fabric-1.21.3-0.8.13 Apr 20251.21.3, 1.21.25.8 MB350 downloadse3f8ca6db024…Get
  • neoforge-1.21.1-0.8.13 Apr 20251.21.1, 1.215.8 MB3.9k downloads98541d5a7337…Get
  • fabric-1.21.4-0.8.13 Apr 20251.21.45.8 MB521 downloadsd6eb14f63717…Get
  • fabric-1.21.1-0.8.13 Apr 20251.21.1, 1.215.8 MB52.6k downloads1de3e2559094…Get
  • neoforge-1.21.1-0.8.02 Apr 20251.21.1, 1.215.8 MB199 downloads64f09be34474…Get
  • fabric-1.21.4-0.8.02 Apr 20251.21.45.8 MB139 downloadsb1997229e756…Get
  • fabric-1.21.1-0.8.02 Apr 20251.21.1, 1.215.8 MB779 downloads730bbe608c38…Get
  • fabric-1.21.3-0.8.02 Apr 20251.21.3, 1.21.25.8 MB122 downloads46cca7b49af6…Get
  • 0.7.1+1.2121 Feb 20251.21.1, 1.215.8 MB243.0k downloadsb05d0cc49ea8…Get
  • 0.7.1+1.21.221 Feb 20251.21.3, 1.21.25.8 MB160 downloads7bed0fa2b4cc…Get
  • 0.7.1+1.21.421 Feb 20251.21.45.8 MB500 downloadsf419f6f44d86…Get
  • 0.7.0+1.21.212 Feb 20251.21.3, 1.21.25.8 MB139 downloads907a16259125…Get
  • 0.7.0+1.21.412 Feb 20251.21.45.8 MB221 downloadsa475400b437e…Get
  • 0.7.0+1.2112 Feb 20251.21.1, 1.215.8 MB2.9k downloadsad490e5d49c6…Get
  • 0.6.0+1.215 Jan 20251.21.1, 1.215.8 MB25.6k downloads81177297b88c…Get
  • 0.6.0+1.21.45 Jan 20251.21.45.8 MB397 downloadsbb3d4df242ca…Get
  • 0.6.0+1.21.25 Jan 20251.21.3, 1.21.25.8 MB144 downloadsd46cae26b6f9…Get
  • 0.5.0+1.21.24 Dec 20241.21.3, 1.21.25.8 MB139 downloads5f02b073004f…Get
  • 0.5.0+1.214 Dec 20241.21.1, 1.215.8 MB3.1k downloads1104beb61cdb…Get
  • 0.4.0+1.2122 Nov 20241.21.1, 1.215.0 MB154 downloads05b7ea9e5aaf…Get
  • 0.4.0+1.21.222 Nov 20241.21.3, 1.21.25.0 MB84 downloadsbeed5d3ac101…Get

Frequently asked

Does Knowlogy Book work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version Knowlogy Book declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Knowlogy Book support?

Everything the author has declared, from 1.21 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Knowlogy Book on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Knowlogy Book support?

NeoForge, Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Knowlogy Book?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is Knowlogy Book under?

GPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Knowlogy Book?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Knowlogy Book safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftArchitectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.AttributeFixRemoves arbitrary limits on Minecraft's attribute system.sparkspark is a performance profiler for Minecraft clients, servers and proxies.

Details from Modrinth, where the author last updated it on 9 Jul 2025. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .