I'm surprised that Snape never published a potions book.

When harry gets the half blood prince's potions text book. It helps him become way better at those potions. It's clear that Snape has an excellent understanding of all things potions. He understands the ingredients and how to assemble them to make a potion. His knowledge goes far beyond the standard potions textbook.

Snape should have published a better potions textbook. He could have used a pen name like Prince.

What do you think?