Secret Monitor Men - Skye Keller, #1

Six friends make the ill-advised decision to pay their respects at a local cemetery well past normal visiting hours. Driven by curiosity, and led by their pal, Ray, stubborn in the belief he is right, the men drift deeper into the abyss of the summer solstice night. Eavesdropping on the dead charges a special toll even for the well-intentioned freemason. As lightning flashes in the distant sky, a premonition overcomes some that the night has its own designs.
Gravestones mark their progress to the square & compass, but should they have let sleeping dogs lie? Skye Keller and cub reporter, Katie Pierce, begin an investigation into nocturnal crimes and strange goings-on, luring them into a secret world, where interlopers remain unwelcome.  The naive girls soon find themselves out of their depth, immersed in an international conspiracy, where factions of a powerful organization are waging war for the right to control the secrets to space, time, and life itself.