Hail, Hail, Euphoria!: Presenting the Marx Brothers in Duck Soup, the Greatest War Movie Ever Made

Raised Eyebrows - My Years Inside Groucho's House (Expanded Edition)

Groucho And Me

The Annotated Marx Brothers: A Filmgoer's Guide to In-Jokes, Obscure References and Sly Details

The Comedians: Drunks, Thieves, Scoundrels, and the History of American Comedy

Sick in the Head: Conversations About Life (and Comedy)