I just finished reading this book a little less than an hour ago and it is one I would definitely recommend. There are a few parts that remind of parts from the Twilight Saga, but I feel like this is a more grown up, adult version.
A Discovery of Witches by Deborah Harkness
Summary:
Deep in the stacks of Oxford's Bodleian Library, young scholar Diana Bishop unwittingly calls up a bewitched alchemical manuscript in the course of her research. Descended from an old and distinguished line of witches, Diana wants nothing to do with sorcery; so after a furtive glance and a few notes, she banishes the book to the stacks. But her discovery sets a fantastical underworld stirring, and a horde of daemons, witches, and vampires soon descends upon the library. Diana has stumbled upon a coveted treasure lost for centuries-and she is the only creature who can break its spell.