Start from a pattern
Letter, Quest notice, Contract and Diary page load a short draft with a fitting number of pages. Replace the text and keep the shape.
Create letters, contracts, journals, ritual notes, and readable written books without fighting page JSON by hand. Write page by page, choose the output syntax, and copy a give command that matches your server version.
Load a draft pattern, then rewrite the pages for your world, faction, or quest.
Keep pages short enough to breathe in Minecraft UI. One page can hold a scene beat, a clue, or one clean instruction set.
Write a book page by page and copy one /give command. The builder handles the quoting and escaping that usually breaks hand-written book commands.
Letter, Quest notice, Contract and Diary page load a short draft with a fitting number of pages. Replace the text and keep the shape.
Signed gives a written book: title, author and generation show in the tooltip and nobody can edit the text. Writable gives a book and quill that any player holding it can open and change, which suits forms and drafts, not evidence.
Only signed books use them. Generation is Original, Copy of original, Copy of copy or Tattered; a copy of a copy cannot be copied again in a crafting grid.
Each box is one page. The book screen does not scroll, so a page should carry one beat: a greeting, a clause, a clue. Add a page rather than making one page longer.
Choose the component format for 1.20.5 and newer or the NBT format for older versions, and the player selector that receives the book (@p by default).
Open the book and check the longest page; if text runs off the bottom, split it.
The builder escapes quotation marks and backslashes, so you can type pages as plain text.
A contract or a cursed diary reads better with its own name or model. The custom item builder covers names and models; the book command itself only carries the text.
Two formats: item components from 1.20.5 and NBT before that. The component output stores each page as a text component, which is how Minecraft keeps book pages from 1.21.5; on 1.20.5–1.21.4 pages were JSON strings, so if you play one of those versions, test a short book first.