This is the follow-up to Riggs' first novel, Miss Peregrine's Home for Peculiar Children. A continuation of the first book in the series. In this one, the peculiar children (who, by this point, the reader should know and understand) are on the run from their former safe home (a time loop), and trying to rescue/save their beloved Miss Peregrine, who is trapped in her bird form. And that's the structure of the book, as the children go from one place to another, one adventure to the next, with not always a lot of continuity between them. Like the first book, the story here revolves around a bunch of old and odd photographs that depict characters and settings that the author incorporates into his story. Sometimes they make sense, but oftentimes I felt as though Riggs was just throwing something into the story to fit with the photos he'd chosen. It's like a creative writing exercise run amok. Occasionally, things are a bit too convenient. (The kids come across, and are kidnapped by, a group of gypsies, who just happen to understand peculiardom and end up helping.) Still, the story can be fun and adventurous, though it does seem a bit darker and more horrific than what I remember from the first novel. And like the first novel, it just kind of ends without any wrap up, leaving the reader in place for the next volume. I mostly liked it; there's just not much depth here.