If she used the fair use test, she would see that the first of the four factors asks whether the work is for nonprofit educational purposes or commercial purposes. The answer to this question affects the evaluation of the other three factors. Sometimes a use that is fair in a nonprofit educational context is not fair in a for-profit commercial context. That's the nature of the test - change the facts and the results change, sometimes dramatically.

Most publishers limit their reliance on fair use to narrow circumstances such as using short quotations in works of commentary and criticism.