I gave this four stars directly after finishing it because I feel five stars is very hard to achieve, but you know what? I loved it. It deserves a 5/5. 
 The characters are wonderful and captivating. It is extremely hard to write likeable characters. It is extremely hard to make character arcs interesting. In this book, the characters are likeable and their story arcs are all fascinating. Do you ever have that feeling when you're reading a book with multiple character PoVs, "Noooo, go back to X! I want to know what's happening with them, not Y!" You will not have this sensation when reading A Darker Shade of Magic. Ever. 
 The worlds V.E. Schwab created are enthralling. Their merits lie in their simplicity. Each world is actually very simple and is only as much as you choose to devote into it. 
 The pacing of the story was very well balanced. There was a very nice combination of different scenes that moved the story along, provided the reader with insight on the various worlds, and indulge the reader in fun, thrilling action. I must admit that the ending felt a bit rushed and abrupt, but it was very enjoyable nonetheless. (view spoiler)[ There was so much explaining for Kell to do, and after, the wonderful relationships we were introduced to in the beginning of the book, I would have certainly enjoyed seeing more details of the repercussions Kell's actions had. (hide spoiler)] I am completely amazed at how this story went a completely opposite direction than I had hoped but it still kept me gripped until the very last page. Never have I been so wrong and loved every minute of it so very much.