I know it’s been two years but Fablehaven has had a renaissance of sorts (orchestrated by me and other dedicated fans), tumblr has a lot of content if you’re interested and there’s even a new sequel series
Cirque du freak, both the novels and the manga. They're amazing, but I've only met like 2 other people who have ever read them. You know the fandom is dead when none of the fics on AO3 have been updated in two years.
I even have the demonata series, though, gotta be honest, it's been a while since I read the first book and stopped halfway through the second (life T^T)
Steelheart is the first book, I highly reccomend it
Such a good series