‘Self Improvement’ doesn’t mean what it used to
The joy and luck, for me, of writing my books, is that I’ve stumbled my way into a form (specifically: the illustrated gift book) that is not only commercial and popular, but also allows me to be as weird and as visual as I want to be. (I really do think of the books as fancy zines.) If they are shelved in self-help, so be it!
All books are, in a sense, self-help: you help yourself to them.