This story brings to mind the works of Edgar Allen Poe (the creepy, yet ethereal beauty of the macabre), Tim Burton (more of the same but with a stronger love story) and a hint of Lemony Snicket (children must solve the riddle, because adults are mostly useless).
It is quirky and just a little bit terrifying.
It's a story about a young magical being (a changeling!) with a supportive family (original) who is trying to find his place in their/his world. It's bittersweet with a hard edge about it -- the grit of real life, I think.
There is a lot of lore, explored very organically, which I appreciated. It was a weird, fascinating tale that's just a little too creepy to be reading late at night.
The only thing I would say I wanted more of is characterization. I wanted to explore more than one or two feelings from the main character, and I wanted to really understand his psyche. I wanted to dig in and get to know the person the entire story revolved around.
So I liked it, but I didn't love it.
That being said, I think it would make an excellent movie. What the characters lacked in "real-ness" would be made up for in the actors' facial expressions and body language.
Bringing it to life on the big screen would, in a way, enable the story to realize its full potential.