D. I. Ghost: A Detective Inspector Ghost Murder Investigation

What should you do if you discover you're dead and didn't know it? Murder Detective Kate Madding does as she always has when something emotionally challenging comes along. She throws herself into work. That's why she is known as D.I. Ghost.
A serial killer is at large and she joins forces with his victims to bring him to justice. Suffering from posthumous traumatic stress when they first meet, their friendship slowly gives meaning to their afterlife, as Kate also helps her twin sister cope with her death.
This is the antidote to the usual serial killer detective story. The victims are feisty and funny and are out for revenge.To quote one of the reviews: "This is a very entertaining book, I love all the characters even the baddies. The story has twists and turns and each spirit has its own strong point. Ingenious ending didn't get it until the very end. Brilliant imagination." And, another:"Truly a fabulous book. loved every moment." And, a third: "The characters are fully fleshed and believable, the plot line well crafted and clever, and the humor's fab.