Here’s the thing: I like Seanan McGuire, but for some strange reason or another her books always seem to rub me the wrong way when she writes as Mira Grant. Because of this, I almost didn’t pick up Into the Drowning Deep, but in the end, I’m glad I did—the premise of a horror novel about mermaids was just too amazing for me to pass up, and I’d be lying if I said I didn’t have at least bit of fun with it. Still, I wish I’d enjoyed the book more, though like I said, there’s probably a precedent for some of my more conflicted sentiments, namely that some of the same issues I’ve had in the past with her characters and world-building just kept cropping up. While Into the Drowning Deep is the start of a new story, it is also technically the follow-up to Rolling in the Deep, a novella chronicling the tragic fate of the cruise liner Atargatis which set sail for the Mariana Trench seven years ago on a mission to film a mockumentary about the existence of mermaids. Only, no one made it back alive. Every member of the Imagine Entertainment studio film crew was…