Something's gotta give

My agent, Bernie Shimshelwitz, has got a heart of gold, but I’m not so sure about his ears. I spent an hour on the phone to him the other night complaining about the terrible case of constipation I’ve been suffering from. I don’t know if it was a dodgy line or he was only half listening, but he sent me the book pictured above the next morning.
It’s not the first time he’s bought me the wrong book, of course (see here).