The first pages of Kate Alice Marshall's novel "Our Last Echoes" remind me of several other books right away: "The Troop" by Nick Cutter, "What Big Teeth" by Rose Szabo, "Watch Over Me" by Nina LaCour, and "The Mist" by Stephen King. The initial narrative takes place within a frame story: we're reading a written document that is presented during a filmed interview that's transcribed in a doctor's case file. I imagine that some teens will be confused by the various levels, but I suppose it adds a sense of unease to the unboxing of the mystery. This particular mystery centers on a newly-graduated teen named Sophia who is searching for her mother - who she believes had died when she was a young child - on a remote Alaskan island under the guise of working as a research assistant at a bird sanctuary. Sophia, though a somewhat shapeless character at first, has visions and dreams, and everything is wrapped in a sinister eeriness from the start. And are there monsters lying wait in the mist? Looks like a perfect pick for teen fans of Rory Power's "Wilder Girls."