The Backstagers and the Ghost Light (Backstagers #1)

The stage crew at St. Genesius Prep--or Backstagers, as they like to call themselves--are ready for whatever the theater world can throw their way: the madness of tech week, inevitable prop malfunctions, and all the paranormal activity that goes on behind the scenes. Luckily Jory, Hunter, Sasha, Beckett, and Aziz are up for the job

But lately, someone--or something--seems set on ruining their production of Phantasm. It all started when an actor brought a Spirit Board to the cast party, and the ghost light blew out. Every good theater kid knows that a ghost light must be left on to keep ghosts from moving in the shadows of an empty theater. To figure out what's haunting the theater and save the show, the Backstagers will have to use their smarts, bravery, and a little bit of magic

The Backstagers series:
The Backstagers and the Ghost Light (#1)
The Backstagers and the Theater of the Ancients (#2)
The Backstagers and the Final Blackout (#3)