The command to give yourself a Reference Book outside of DiamondFire, presumably a singleplayer world, or a server you have Operator permissions on is as follows: /give (it's the command to give a player any item of choice. A player is an entity, which the real player controls. Players have a unique name, also known as a "Username", or simply "Name". Players also have their own "skins" which are customizable looks that the real player can set.) @s (@s means basically %default but in commands. If you do not know what %default is, it's the player, or entity, which triggered the event. In the context of a vanilla Minecraft command, @s is the player or entity which executed the command, or the entity which the execute statement is running as.) written_book (It's the name of a signed book. Since the Reference Book is a signed book, you must use this one. The difference between a signed book and a writable book (also known as a Book and Quill) is that Written Books (also known as Book and Quills) cannot have JSON formatting. JSON stands for JavaScript Object Notation. It is widely used by many softwares. But here, we are focusing on how Minecraft uses it. Minecraft uses JSON in many areas, such as Raw JSON Strings, which can be used pretty much everywhere, ranging from /title (A command to display text on a player's screen) to /tellraw (A command to print any message on a player's chat). Books also use JSON. 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