Definitely a satisfying ending. 
 I am so hooked with this trilogy that it's hard to say goodbye to it. I love this dangerous-yet-thrilling dystopian world and of course the characters. I am so happy for Peregrine and Aria. Their love story just made me swoon till the end and they both improved in this last installment. I will miss them, and of course, my dear Roar. I hope he'll find someone who will make him happy, his own still blue. I won't forget their beautiful world (view spoiler)[No more Aethers! yay! (hide spoiler)]. 
 This trilogy is highly recommended. Veronica Rossi indeed created this world beautifully. I love it! Definitely my favorite.