WOW. Gone Girl is exactly what it promises to be - a mystery thriller about a missing wife and her suspicious husband - but doesn't follow the normal trajectory. I love being surprised when reading, and this book has two big plot twists that left me reeling. And if for no other reason, I would recommend this book because the story is so engaging that you simply can't put it down. I was turning pages and staying up late the same way I did with most of the Harry Potter books.
With that said, the book left me with a strange "huh" feeling after reading, and I didn't end up liking any of the characters. I found the plot to be too far fetched - and that's coming from a person whose favorite series include Lord of the Rings and the Walking Dead. I can believe that goblins and monsters and flying witches exist, as long as they make sense within the world the author has created.
But Gillian Flynn has done masterful work in this book because she knows exactly what she's doing. She has a reader on a string, getting you to think and feel exactly what she wants you to. So maybe her plot was believable within the world she created; maybe The Gone Girl world was just meant to be really twisted. You've been warned.