Outside of a Dog, a Book is Man’s Best Friend. Inside of a Dog, It’s Too Dark to Read

Groucho Marx? Ted Atkinson? Jimmy Husson? Jim Brewer ? Mary Stuart? Anonymous? Dear Quote Investigator: You have researched some quotes credited to Groucho Marx, so I am hoping that you will be able to look into a saying that interests me. I work in a library and have long enjoyed the following quip: Outside of …