> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hyperline.co/llms.txt
> Use this file to discover all available pages before exploring further.
# Price books
> Learn about extending your product catalog with price books and fine-grained pricing attribution
## What is a price book?
A price book extends the prices in your product catalog. It can be created for specific user roles or all users within your organisation, allowing fine-grained control over product pricing.
Users with access to a price book can assign it to a customer or select it when choosing a price for a product they're adding to a quote or subscription.
## Create a price book
To create a price book, go to the [products section](https://app.hyperline.co/app/products) of the Hyperline interface.
From there, you will see a dropdown with "Default catalog". Click on it and
select "New price book".
Fill in the details of the price book and the user roles who can access it.
## Add and manage prices in a price book
Once your products are added, they will be prefilled with the existing prices from your main catalog.
Note that you can only edit the prices from the price book section. The rest of the product information is for reference only.
## Assign a price book to a customer
If a customer is assigned a specific price book, its prices will be used by default when creating a subscription or quote for them.
## Apply a given price book when assigning a subscription or a quote
When creating a subscription or a quote, you can choose which price book to use. If a price book is already set for the customer, it will be selected by default.
You will see the price book used for the product in the subscription details.
