The cover features one of the illustrations by Edmund Giesbert (1893-1971) and they are the best thing about the book.
Here is a collection of Giesbert's other artwork from the book.
A little more about Giesberg: He was born in Neuwied, Germany, but later came to America. He served as an art professor at the University of Chicago and was an artist who worked in many different mediums. Here's a picture of him from the University of Chicago photographic archives.