I am just know doing some research on my wifes side, and her grandmother was an Adler related to Felix Adler. We have a book written by Anne Aull Bowbeer on Felix Adler "King of the Clowns". It was published in 1999 by the Clinton Printing Co. P.O. box 64 Clinton, IA 52733. The front cover is a picture of Felix on a Mechanix Illustrated magazine, lots of pictures and information in it.I will see what I can put together.