In multiplayer, players can use the book interface to create "Parties," enabling team-based quest progression where rewards are shared among all members.

: It was frequently included in "Expert" style packs, such as Enigmatica 2 Expert and Modern Skyblock 3 , to manage progression and rewards.

Since this file isn’t a known public mod:

If this were to be documented as a short paper:

Most packs provide a simple recipe, often just a single piece of cobblestone and a standard book, or include it in the starting "starter kit".