*4.5 out of 5 stars* 
 It's rare for me to find YA series that I wholeheartedly enjoy (or, for that matter, even ones that I don't have issues with.) "Grave Mercy" was an expertly crafted first book in a series. A beautiful blend of historical fiction, fantasy, and political espionage, it was incredibly entertaining from beginning to end. The romance was also surprisingly well-done; I couldn't wait to find out what would happen between the two main characters (which very rarely happens.) I can't wait to continue on with the rest of the series!