I don't know where to start... I LOVED THIS BOOK.
I can often tell who the bad guy is when I read/listen to a story but I spent 7 of the 9 hours completely clueless to what was going on. I don't mean clueless in a bad way but I suspected the step mother, the step mothers friend, the sister, the boyfriend, the neighbor and so many more before being told the truth.
It also took me some time to figure out if the mystery in the book was paranormal or man made...
Cuckoo is about two sister who find out that their step mother has passed away. They need to clear out her home and the older sister Steph is not interested. Carol decides to go to her childhood home and is constantly reminded of things from her childhood she'd worked hard on forgetting.