The pacing was so slow at times but otherwise this is a terrific fantasy novel about love, friendship, and found family. Esther and Johanna are half sisters that have been separated for years. They're from a family of magical librarians that protect spell books. When Esther is attacked at the compound in Antartica she works at, she flees to escape her attackers. At the Library in Europe, Nicholas a Scribe and his hired bodyguard Collins discover family secrets that could be killer. This book weaves the world building so effectively into the characters and their motives. Its both very YA feeling and also insanely gory and dark but very well balanced.