Biology Dictionary

A Biology Dictionary book is obtained from the end city Tools and Utilities tab, bought from Wandering Traders, or set up by the pack author. Right-clicking with it or pressing the hotkey opens a screen whose contents depend on what the player is looking at. In Survival the book is required unless the config changes that, while in Creative the hotkey always opens the screen without a physical book.

The mod keeps a full mob catalog that covers vanilla and modded mobs, collected automatically once set up. Each entry records how and where the player first met a mob, and the book tracks discovery progress, showing which mobs have been found and which are still waiting. Discovery rules can use a simple mode, vanilla kill statistics, or the mod's own discovery system, and the default setting hides details of undiscovered mobs.

The mod is open source under the GNU Lesser General Public License v3.0 only and requires Architectury API, Cloth Config API and Fabric API. The server and every player need the mod installed. Files cover 1.20.1, 1.21.1, 1.21.11, 26.1.2, 26.2 and 26.3, with the latest build for 26.1.2.