Was Maggie using a variation of the Sight to identify what was in those kids? Is that why she is so jumpy because she is seeing something that others don't see?
I got the sense that that wasn't a "magical power" thing, it was a "being a kid" thing. The story wasn't totally clear, but it seemed to be indicating that haunts and creeps and baglers and underhides and whatnot were things that all kids could see and had to deal with, but forgot about as they grew up. Then again, maybe not, because the kids Maggie rescued didn't seem to know what was going on. Still, ZD talked about how each of the Carpenter kids also once knew about them then forgot as they got older, and apparently there's a "Book." Maggie is the first adolescent voice we've heard from in any story so far, so it would make sense that we haven't heard of them before. Although I immediately thought of Ivy, and I wonder how her knowledge of them would work with the Archive?
I loved this short story, it might be my favorite. Maggie's character is awesome, and now I really want that Maggie/Mouse series.