OK. SO. This book blew my mind in the best possible way. A lot of the press says "If you liked Gone Girl, you'll like this!" and a) that's true while also being b) misleading because this book is like Gone Girl x 10000. Like, Gone Girl has the one mega-twist about 1/3 of the way through that makes you go whaaaa? while this book has a twist like that about 1/4 of the way through, then another at 1/2 and like six more after that. It just keeps getting twistier and twister, which I loved, and the heroine of the book is like Amazing Amy x 10000 + 10000 bonus points of likability. I was cheering this this murderous angel throughout. Or the parts she's in. Don't want to spoil anything. 
 So, ten thumbs up. Fantastic. Loved it. Super recommend.