2.5 probably. 
 I DID give it 3, but thinking back ... no. 
 First off is 
 the CHARACTERS 
 . What the heck even happened? 
 I still LOVE Ronan Lynch with all of my heart, and it was a shame that he wasn't seen much and that he didn't get a point of view. Everyone was always talking, especially in the beginning, about how he had changed so fucking much, but it just wasn't really seen. Also, I'm pissed off because what the fuck! EVERYTHING in Ronan's character up to this point has shown him to be extremely damn loyal to his family (and I would say that even Declan would fit into this category, maybe?) but he FORGIVES THE GRAY MAN ! My. Fucking. Ass. 
 Adam Parrish pissed me the fuck off. All he did was move rocks about for trees who talk to him - which was boring - and go on and on and on and on AND FUCKING ON about how he was oh so unknowable. Like, what does that even mean? It sounds pretentious as hell and ties into Maggie's weird issue of quirkyness and special-snowflakeness, and by the 5 millionth time he said it, I was past the point of liking his character. The character of Blue Sargent was similar to Adam's in that a) I didn't like either and b) it again shows that Maggie has some weird thing about individualness and quirkyness! Also, all of her feminist yellings does absolutely jack shit when she barely acts like a rational person at all ... what the heck is up with her going off at Gansey periodically if he gets something wrong about her ~financial and social state~ or for talking to another rich Aglionby boy! Get overrrr itttttttt bitch. Also, no offence but she CANNOT be upset about not being able to get into whatever university she wants, as she barely studies! Look at Adam! That is an example of a Person Who Studies. 
 I really don't have much to say about Gansey. Was he even present for most of the proceedings? I don't believe so! 
 The other characters: Mallory was probably the most annoying to read about. Another Brit written by an American who is nothing but an old posh wanker who only cares about tea. Come on, I'm pretty sure nobody says 'the colonies' anymore, even rich fuckers... ESPECIALLY a history person like Mallory. Also, his thing about tea was boring, completely unnecessary, and made Maggie seem like she literally never has come to England. Yaaawn. The Gray Man sucks ass and has literally no personality (greyness and pretentious poetry) to redeem him from, you know, MURDERING people. He's definitely done nothing to earn the random and out of character respect of Ronan... refusing to kidnap him doesn't even come close to counting. DITTLEY PISSED ME OFF BECAUSE ALL OF HIS SPEECH WAS IN CAPITAL LETTERS, IT IS DISTRACTING AND FUCKING POINTLESS. IF THIS IS A WAY TO MAKE YOUR STORY SEEM MORE INTERESTING THEN IT SEEMS THAT YOUR STORY IS PRETTY BAD. 
 Okay, so the fact that an old Welsh king is buried in America is pretty unbelievable, and the explanation for this just fell flat. (view spoiler)[Cabeswater. (hide spoiler)] Seriously, that is IT. There is honestly NOTHING so special with this to indicate WHY this would be the case. It is more likely that Maggie is incapable of portraying non-Americans as well rounded people, as is seen with Mallory and, previously, Kavinsky. Even Ronan - and his family's - main trait is that he/they was/were FARMER(S) who do IRISH FUCKING DANCING and also HATE THE HOT WEATHER. How hard would it have been for poor M.S. to write this in, god forbid, Wales itself? Ouch, no. 
 It barely seemed like there was much plot to speak about, so I can't even say about that. Blue and Gansey NOT kissing, Adam moving rocks, Ronan making dreams in the Barns, Maura in a cave, Persephone being weird and then dying, Greenmantle being there pointlessly and then running away, and Piper being a (interesting) bitch.