2 stars 
 I feel kind of bad giving this only 2 stars because I didn't really dislike it for the most part. The first 200 pages were 2.5/3 star material - the main character is Cadence Eastman Sinclair - the eldest grandchild of a super-rich family and the book centres around her time spent with her 'liars' - her two cousins and her cousin's friend, on their family's private island. Cadence has bad migraines and some amnesia following a traumatic event she can't remember and much of the book focuses on her trying to remember this. I felt like the first 200 pages, if it had been properly fleshed out and the characters given more depth, could have been pretty enjoyable - I really like reading about groups of friends and think I would have quite enjoyed reading lots of stories about their time spent together and their friendships. As it is, the book doesn't do that at all - it's kind of trying to be a mystery thriller but it isn't and it just doesn't really do anything for much of the book. Right towards the very end, I was starting to feel like I could get attached to some of the characters - particularly Johnny and Mirren - if I'd had more time with them - but this was completely lacking. I kind of feel like the book didn't fully know what it was wanting to do and, as a result, it didn't really do much at all. 
 And then the end. A lot of people seemed to really like the end, to think it was the best part of the book but I just thought it was stupid and didn't make any sense. I think it ruined the few things the book had managed to achieve and felt gimmicky and just really, really annoyed me. I can't properly explain why without spoiling it but it really annoyed me. 
 BUT a lot of people love this so maybe it's just not for me.