"Sarah Stein" was a wealthy American art collector. With her husband Michael Stein, the older brother of Leo Stein and Gertrude Stein, she lived in Paris from 1903 to 1935. She supported and popularized the painter Henri Matisse.

More Sarah Stein on Wikipedia.

[Publishers] are fleecing students that just want to learn.

It's not nice, but it is legal.