There was an interesting article on Screen Rant a while back, about 10 YA book series that were adapted into movies but failed to enjoy anywhere near the kind of success of the Harry Potter and Twilight movie series. Cirque Du Freak was one of the ten on the list, and regardless of one's view of the movie, there's no denying it was a box office flop, hence the lack of any sequels.

I think the list highlights two intriguing things. The first if that it's very difficult for movie makers to successfully adapt a book series -- they fail far more often than they succeed. The second thing is that a few of these have gone on to be far more successfully adapted for TV, which suggests that maybe that's a better medium for large-scale story-telling.

Work is still ongoing on a possible Cirque Du Freak reboot (although everything has stalled at the moment, because of Covid-19), and the plan is to go down the TV series route with it, if all works out. Hopefully, if it gets off the ground, it will enjoy some of the success of shows like A Series Of Unfortunate Events or His Dark Materials -- although there are plenty of flop TV shows too, so, you know, don't anyone go counting any chickens just yet!!! :-)

https://screenrant.com/harry-potter-young-adult-franchises-tried-failed-to-be-next-harry-potter/

One thing that never flops is the Shanville Monthly! Home to all the latest Darren Shan news and updates, the June issue is now live, and includes plenty of info about my new Archibald Lox series. https://www.darrenshan.com/news/shanville-monthly/