Ben Katchor is best known for his comic strips about eccentric characters, like Julius Knipel, Real Estate Photographer. Katchor has now transformed one of his strips into a stage musical. It’s called The Slug Bearers of Kayrol Island or the Friends of Dr. Rushower. It’s a romance and the tale of a philanthropist who brings the modern poetry of instructional pamphlets to a group of exploited workers on Kayrol Island. Amanda Aronczyk spoke to Ben Katchor.