Although my books aren't mentioned in it, this is a very intriguing (and worrying) article about the rise and fall of YA literature over the last couple of decades, that I think will prove of interest to anyone with even a passing fascination with the genre.

https://slate.com/culture/2019/12/decade-in-young-adult-fiction.html

I've certainly noticed a change to my own YA work among the publishing fraternity, and a few other authors have commented about this as well when I've been chatting with them. When I wrote Cirque Du Freak back in 1997, children's publishers were very wary of it and unwilling to even take a punt on it, as they preferred to focus on books for younger children. Sadly, we seem to have come back round that way again. It doesn't mean that good YA books can't get published or aren't being published. It just means it's a lot harder to get your work out there now than it was ten or so years ago, and much much harder to get a publisher to really back it and take it to a wider audience even if they do take a chance on it. Hopefully the pendulum will swing back the YA way again in the not too distant future, but at the moment it's a bit of a battle if you love those types of books and want to devote your energy to creating them...