The non-fiction author Arthur Marx died at the age of 89. Here is all you want to know, and more!
Biography - A Short Wiki
A nonfiction author, television writer and producer, and amateur tennis player, he was the son of the famous Groucho Marx. He published several memoirs detailing his relationship with his father; these include Life with Groucho (1954) and Son of Groucho (1972).
He was married to his second wife, Lois Gilbert, from 1963 until 2011. Previously, he had been married to Irene Khan for nearly two decades.