The Man Who Dealt in Death. The Colton Fen Series, #1

Deep beneath the desert town of Peridot, something evil lurks. Werewolf detective Colton Fen is used to strange mysteries, but when he arrives in Peridot on his latest assignment, he's less than pleased to be assigned a partner. Rennick Dalton is a blood-drinking, illusion-wielding card shark who doesn't have the best reputation. The two unlikely partners will have to put aside their differences if they hope to stop the horrible acts taking place beneath the streets of Peridot. Together with the help of sharp-shooting actress Mary Silva, they'll track the demonic creature that slithers beneath the desert.
But the demon is waiting for them. It wants to turn them into one of its many disturbing minions - or add them to its grotesque collection. Step into a dangerous and fantastic world set in the old west of 1893, where supernatural creatures and unexplainables live alongside cowboys and gunslingers. THE MAN WHO DEALT IN DEATH is Book One of the COLTON FEN series.