Delightful is the wrong word, but it's what I'm going to use.  This was a delightfully creepy, disturbing prequel novella to Drowning in the Deep, and I'm so freaking happy I finally read it!  I loved learning what happened to the Atargatis first hand, even though, the readers knew the outcome from the book.  It's (again I'm going to use the wrong word) nice to have seen what these folks all went through.  Horrifying, but it gave me a glimpse at what all happened.  And since it's been years since I read Drowning in the Deep, it was "fun" to dive back into this world and story.