There are young adults dealing with young adult problems in this story... but alongside that, young adults dealing with extremely adult (and horrifying) problems. This story is a wonderful blend of YA fiction and eldritch horror, with characters that are easy to relate to... and grow attached to. I'm not familiar with every YA book out there by any means, but nearly all of the teenagers in this story are as complex as any adult, and I feel like that's actually not all that common in YA books (brooding boys with Secret Hearts Of Gold come to mind).
I have very few qualms with the story, and they hardly impacted my enjoyment of the book. I got particularly hung up on a character's name, and on the strange habit for everyone to shorten already shortened names (though to be fair, that does kind of get addressed in the writing). Small word choice issues, moments where I wondered "would a 14 year old actually think this or feel this?"
But then I realized... mostly, yes. 14 year old Abigail Thorndike and 14 year old me had very, VERY similar thoughts, especially with regards to boys and school. Halfway through the story, I stopped thinking of their specific ages and just thought of the characters as "teenagers", which helped me get past any hangups I had about their actions or thoughts.
There's a creeping sense of horror throughout the story, the sense that you are only ever privy to as much of the mystery as the characters are, and it constantly urged me to keep turning pages to get to the end of the story (where a very major mystery is still not solved, so I guess I have to wait for the second book!).
There's a very touching, and satisfying, moment between two of the (male) main characters near the end of the book, and I won't ruin it, but it did make me a little teary eyed.
I strongly suggest this book to anyone who likes a little Arkham horror in their lives, or anyone who's curious about what that actually means. The characters are sympathetic and interesting, the setting is gorgeous and vibrant, and I can't wait for what happens next in the lives of the Arkham teenagers.