This was a very popular play and book from the turn of the 20th century.   Klein's best-regarded drama,  The Lion and the Mouse (1905), was prompted by a visit to the U. S. Senate. The story concerns a young woman taking on a powerful business tycoon. One of the corporate figures in the play was made to look like one of John D. Rockefeller's partners, H. H. Rogers.  It was even made into a movie in 1928--a very early talkie using the Vitaphone process--starring Lionel Barrymore. This book was reissued again by Grosset at that time.