The Defeated Detective. Supernatural Sleuths Series, #1

Many years ago, when Detective Royce was travelling in India, he found himself in the unfortunate position of being dead. Murdered, to be precise. But he made a contract with the Goddess of Death, which allowed him to return. This contract is what drives him now. Because he supposedly fails every single case he takes on, he's known as the Defeated Detective. Featuring 5 Defeated Detective Stories: The Moon Was Shining Bright When They Killed Me: The first murder Royce must solve is his own.
As soon as he digs his way out of his grave... My Client is Already Dead: Royce's latest client is dead, but since when did that stop him from taking a case? RSVP Murder:  A man predicts his own murder and invites Royce to investigate. You are Invited to a Murder: Someone is going to be killed live on stage, unless Royce can stop it. Can he? The Dame Who Loved Me: The wife of a man Royce murdered wants his help in finding him.  Part of the Supernatural Sleuths Series These detectives don't deal with normal cases.
No missing cats and cheating husbands. Only demons who want to rip them apart, dead people who want to solve their own murders and gods who play with them like puppets. Books in the series: Book 1: The Defeated Detective: Royce loses every case he takes. Also, he ends up being killed a lot and must often dig his way out of the grave before he can solve any crime. Book 2: The Mad Detective: Malk is a homeless boy who sees old horrors that shouldn't exist.
And when they murder innocents in our world, he must bring the monsters to justice. If he can. Book 3: The End of The World Detective: The apocalypse may have happened but crime hasn't gone away. Elric will make sure that people don't use the apocalypse as an excuse to get away with murder.