Ashes (Walker), book 2: Dust to DustMelissa Walker2015

When Callie McPhee miraculously recovers from a tragic accident that should have taken her life, she thought her connection to the ghost world would be severed forever. And that she would never see Thatcher—the ghost she fell in love with in the hereafter—again. But when she receives unexpected signs from Thatcher, she's led down a dark road toward the angry souls who once tried to steal her soul's energy for another chance at life.

Now Callie must prevent the real world and the spirit world from colliding, and that could mean saying good-bye to people she'd never imagined she'd lose.