ASH by Stetson Smith
Viola Preston loves exploring abandoned places with her friends and looking for ghosts. But when they break into an abandoned asylum, they get more than they could have hoped for, human ashes.
It turns out, the ghosts they had been looking for were real? It sure looks that way as they all start seeing the dead. And the dead are looking back.
Can Viola figure out what’s going on before they become ghosts themselves, and still be a normal highschooler?