Purple wardrobe book

This one has me stumped for the moment.

When I was a kid, in the late seventies, someone gave me a book. It was a large-format hardback illustrated thing, with what seemed like a lot of text at the time.

The pictures were all purple line-drawings, which I found scary. I think some people had spirals for eyes.

There was a looming wardrobe involved, and I think the main character was a little girl whose name began with A. Not April, not Agatha. Hmmm.

My parents don't remember the book, and I haven't come up with a good Google search that will help me nail this one. Oh well, it will keep me occupied.