Blood Magic by Tessa Gratton

It starts off simply.

Draw a circle... place a dead leaf in the center... sprinkle some salt... recite a little Latin... add a drop of blood...

Maybe that last part isn't exactly simple. Yet somehow it feels right to Silla Kennicott. And nothing in her life has felt remotely right since her parents' horrific deaths. She's willing to do anything to uncover the truth about her family--even try a few spells from the mysterious book that arrived on her doorstep ... and spill some blood.

The book isn't the only recent arrival in Silla's life. There's Nick Pardee, the new guy next door who may have seen Silla casting a spell. She's not sure what he saw and is afraid to find out. But as they spend more time together, Silla realizes this may not be Nick's first encounter with Blood Magic. Brought together by a combination of fate and chemistry, Silla and Nick can't deny their attraction. And they can't ignore the dark presence lurking nearby--waiting to reclaim the book and all its power.

This book is part of the "The Blood Journals" series.
Here are some other books from this series: