Lies Beneath is a YA novel about Calder White and Lily Hancock. Calder and his sisters (merpeople) seek the debt owed to their mother by Lily's grandfather. This debt is Lily's father.
I had my doubts about reading a book on merfolk. Despite my misgivings I really enjoyed this book. Took a couple of chapters, but once I got into the book I couldn't put it down, which is something hard to do when you're reading 3 other books!