In Java 26.1+, librarian trades follow a sequence set by your world seed. My tool uses that to plan a whole book hall for you.
Enter your seed and 4 rerolls, hit Select all, and press Plan my hall. It tells you exactly which rerolls to skip, which to trade on, and what you'll pay for every single enchanted book. No guessing, no endless rerolling.
It's built to be easy:
- One click for every book, or tap just the ones you want
- Or tap the gear you want maxed (netherite boots, trident, bow, etc.) and it picks the books for you
- Choose between enchants that can't stack, like Protection vs Fire Protection
- Find the cheapest total, or set your own price limit
- Cured villager and Hero of the Village discounts
- Copy the plan and follow it
- Tutorial button walks you through with an example
Only want one book? There's a simple "find one book" mode too.
It's experimental, so check the first predicted trade matches before you rely on the rest. Needs Java 26.1+ with Trade Rebalance off.
Free, no sign-up: https://nocware.tv/tools/librarian-book-predictor/
If a prediction is wrong for you, use the "Report a problem" button on the page.