Fine book, there were good moments of tension and some good scares. I just really hated Moore, but I don't think it's her fault. I feel like she just suffered from woman-written-by-man syndrome, and worse in that she was the "cool girl" subtype who swears a lot, is crass and vulgar around men, writes naked as an uber-feminist-reclaiming-my-sexuality power move, and doesn't take no shit from no one. Bleh. Honestly, any character that wasn't a young, thin, cishet white man (i.e. Sam) seemed to written incredibly stereotypically and cliched, and at times just offensively (i.e. Daniel, Moore). 
Also just such a long story switching between POVs from like half a dozen characters, only a few of which get somewhat fleshed out that scenes ended up getting repetitive and tedious.
Final thing, none of the twists were all that twisty.