How to tell the joy of reading

An easy way to tell if you are really enjoying reading a book or not.
1. Look at the thickness of the pages left.
2. You might think it is thicker than you imagined.
3. Why do you think so?
4A. Because I want to read more.
4B. Because I want to justify quitting right away by imagining what a waste of time and energy to continue this long….