I had subscriptions to a few of those SF magazines! SF short stories are what I first started trying to sell, back in the days when fiction magazines were still big. It wasn't until a few years ago that I finally sold one ... something like forty years later.

The Oz books actually were children's stories, so ... there you go. But as the fans got older they still held onto the love of the books, so now much of the new Oz products are designed for adults, or for "the whole family", which often disappoints. "Wicked" is very adult material, and a well made fantasy. My own Oz book will be readable by young adults, but has more of an adult sensitivity ... if I ever get the darned thing published.