You can't get your market sense from the book.

It's about how you observe the people around you.
Look from their perspective, understand their need.

Then, create value for them.

You don't need to come up with an ambitious dream.
You don't have to start inventing the new generation of smart phone.

Business can be simple and stupid.
It can be as ordinary as something you may not even notice its existence.

Then, it's all up to you.
What colors do you want to paint on it?