Dead Is a Battlefield — Marlene Perez

Jessica Walsh is starting her freshman year at Nightshade High and trying to forget about the tragic events surrounding her brother's graduation. She wants to have a normal high school experience. But that's easier said than done in Nightshade.

There's a new guy at school who seems to be turning the girls into lovesick zombies.
And Jessica has other worries -- like her crush on a cute but moody lead singer,
and the mysterious tattoo that appeared on her arm one day that lets her know whenever there is trouble brewing. Jessica learns she's a Virago, a woman warrior chosen to fight evil whenever it threatens her hometown. But does a lowly freshman really have what it takes to keep Nightshade safe?