Isaac Vainio has spent the past two years working at the Copper River Library in northern Michigan, secretly cataloging books for their magical potential, but forbidden from using that magic himself -- except for emergencies. Emergencies like a trio of young vampires who believe Isaac has been killing their kind and intend to return the favor. Isaac is a libriomancer, brilliant but undisciplined, with the ability to reach into books and create objects from their pages. And attacking a libriomancer in his own library is never a good idea. But vampires are only the beginning. This is merely the latest in a series of attacks against members of Die Swelf Portenære, a secret organization founded five centuries ago by Johannes Gutenberg to protect the world from supernatural threats. Among the casualties is Ray Walker, Isaac's friend and mentor in magic. Complicating matters further is the arrival of a dryad named Lena Greenwood. Lena packs a pair of wooden swords and proves to be quite adept at helping to beat down various magical threats. She also seems to be a little too interested in Isaac -- not that he minds. Yet Lena's nature could make her a greater threat than any vampire. Along with a neurotic fire-spider named Smudge, Isaac and Lena set out to find and stop whoever is behind the attacks. But things are worse than Isaac imagined. An unknown killer of unimaginable power has been torturing and murdering humans and vampires alike. And Gutenberg, now more than six hundred years old, has mysteriously disappeared. As Isaac searches for Gutenberg and the murderer, hoping they aren't one and the same, he uncovers dark secrets about magic's history and potential. Secrets that could destroy Die Zwelf Portenære and loose a magical war upon the world. If Isaac is to have any hope of preventing that war, he will have to truly master the magic of libriomancy. Assuming he doesn't lose control and wipe himself from existence first.