I had a few minor complaints, but I'm rounding this up to five because I enjoyed the worldbuilding and the story so much. It managed to surprise me a few times, too, which was refreshing. I admit I find it annoying that everything new in YA seems to be a series these days, but I'm really looking forward to the next installment of this. 
 Also, some trivia: the description of the Archive reminded me of the Doctor Who episode "Silence in the Library," so when the character Roland showed up (wearing his Chucks and speaking with a slight Scottish accent), I immediately thought of David Tennant. Turns out Roland is indeed based on Tennant. Guess that was a good description. :)