This isn't a book. It's half a book—or, if you'd rather, think of it as the installment in a serialized novel. It is not, however, a standalone read.
Yes, it's part of a series—but within a series, each book usually functions as a standalone unit. This one is pure setup.
I'm not a fan of that approach, but that doesn't mean it's bad. It's just something you might want to know up front.
The writing itself is middle-of-the-road. It has some strong moments, but could use a bit of polish overall.
Berry's strengths, meanwhile, are her characters and ideas. I find that I quite like Lively Deadmarsh, his twin sister Minerva, and Harder, the police inspector who drives the 1981 storyline. I want to find out what's going to happen to them.
The Sinclair Hotel itself is also a character—though my jury's out on whether or not it's an effectively-drawn character.
Berry has clearly built a complex world, here, and I'm interested in finding out how it ticks.
This isn't a novel (or half of one, anyway) that'll stun you with its beautiful prose—but it's still a fun read up to this point and worth picking up—just don't expect anything in the story to even begin to be resolved by the last page.