If schools across the country stopped using textbooks what would happen in the market for textbooks?

consider this with this answers:

The rate of e-learning or e-books is increasing, so in some years to come schools might have to stop using textbooks.

When schools stop using the textbook, the market have to adjust to that situation.

There are various situations in a human life, so people have to learn to adapt to them. The markets have to do so but it might not be easy because they are not used to it, but they have to try other methods like uploading those books on social media to sell or other means.