Gorey is typically described as an illustrator. His books may be found in the humor and cartoon sections of major bookstores, but books such as The Object Lesson have earned serious critical respect as works of surrealist art. His experimentation—creating books that were wordless, books that were literally matchbox-sized, pop-up books, books entirely populated by inanimate objects—complicates matters still further.

In response to being called gothic, he stated, "If you're doing nonsense it has to be rather awful, because there'd be no point. I'm trying to think if there's sunny nonsense. Sunny, funny nonsense for children—oh, how boring, boring, boring. As Schubert said, there is no happy music. And that's true, there really isn't. And there's probably no happy nonsense, either."