Ashes to Ashes begins with an interesting premise. Callie lost her mother when she was six. Since then, she has had a less than open relationship with her father, but enjoys a loving best friend, Carson, and a boyfriend, Nick, that she is in love with. Her father buys her a new car which she wrecks in an attempt to find a thrill that is missing in her life. In the wreck, she dies and goes to a place called the Prism where the dead go to help their loved ones deal with the death by "haunting" them. Many of the ghosts in the Prism want to use Callie's energy to find a way to take possession of the bodies of the living to come back to life. Thatcher, Callie's spirit guide, tries to protect her from those who would use her for nefarious reasons.
I found this book frustrating. So many topics are raised in this book, but almost none are addressed, even by the end of the book. Apparently there is a sequel, but that isn't clear until the last page of the book, leaving the reader frustrated by the lack of progress the book makes.

Honestly the ending left with a HUGE cliffhanger. The author should have made a second book !!!!

Interesting treatment of two distinct ways for a ghost to haunt... spiritually in order to comfort loved ones or physically as a poltergeist.

Definite religious overtones, just FYI.