Keeping Paige wasn't a bad read, but I felt that there was little to no real romancing in the story.
It seemed that Paige and Aidan just sort of rolled into bed together, and then Paige started wanting to run whilst Aidan was playing Mr. Nice Guy. Then suddenly she runs and then is given over into Edward's custody and treated like a prisoner...
I just felt that there wasn't a whole lot of character development for Paige or Aidan, and I didn't get a good feel for the world that they were in. For that matter, I didn't feel that Aidan had much of a character and Paige was just one-dimensional. First she wanted to escape and then when that didn't play out so well, she wanted Aidan to save her. Not much was introduced or explained and then the book just suddenly ends with a happily ever after, leaving you very much in the dark.
In the end, it seemed like the other girls who were sent to that world had more personality and were more interesting than Paige was. I might pick up the other books just to see if their stories are better.