Claire LaRue is an evidential medium. She brings forth verifiable evidence from those across the veil to loved ones in the physical world. This brings joy and enlightenment to many, yet poses a threat to others who see this as an abomination that must be severely dealt with.
I've not read any novels that illustrated the connectedness of those in the afterlife with those in the physical world and how those in the afterlife affect the reality of the physical world.