How to get a sample without the results of another sample?

Question

MySQL

I have Sequelize models

• `User` with `name` fields
  
• `Book` with `bookName` fields
  
• `Own`
  
• `Read`
  

The `User` model is related to `Book` via `Own` as M<->M , this is how I store users and their books.
The `User` model is linked to `Book` via `Read` as M<->M so I store users and the books they have read, not necessarily my own.
How can I get a list of books that the user has, but he has not read them?

Answer 1

If in SQL, then ... LEFT JOIN... WHERE ... IS NULL(ORM does not allow doing this - maximum on QueryBuilder).
If in PL, then by brute force
with verification

he did not read them