Grimm Awakening

"Private investigator Jack Grimm wakes up in a seedy motel room in Hell following an epic bender. The resultant blackout renders the circumstances of his arrival in the devil's domain murky at best, though a mysterious note provides a clue. Thus begins Jack's tale of fear and loathing, which plays out against a backdrop of glitz, gangsters, and gunfire and includes a trip to the mortal realm's center of decadence and sin. Las Vegas, baby. So hold on tight. It's gonna be a wild ride." – quoted from this book's product page on Amazon.com as of 2017-07-21.