Bound Spirits. The Spirits Series, #3

Gilmore Girls meets Ghosts... The Wilson sisters' father is getting remarried. Both sisters are ambivalent about the news, each for their own reasons. For Chris, it means making nice with an annoying new stepmother who's too close to her own age for comfort, playing the dutiful daughter and stepping into the unwanted role of maid of honor. For the ghostly older sister Ron, it's a painful reminder of her own culpability in their mother's death and the rift it formed between her and her father - a rift that never got a chance to heal before her own untimely demise.
When a mysterious woman in white appears and begins wreaking havoc, threatening to put a stop to the wedding plans, Chris is almost relieved. But when her dad's bride-to-be, Marsha, pins their mother's spirit as the culprit, both sisters are determined to get to the bottom of this haunting and clear their mother's name. It soon becomes clear that the entity they're dealing with is far too sinister to be their mom, and also far too deadly - and for some reason, it seems to be fixated on Marsha.
As the sisters and their respective partners work together to solve this mystery, they uncover old secrets, as well as a whole other side of their future stepmom. Murder, tragic loss and mental illness are all brought to light, but so are forgiveness and redemption as they discover that a soul may become bound by tragedy, but there is no bond stronger than love.