When it comes to murder, Rex Dalton has no doubt he'll bring the real killer to justice... Rex Dalton and his dog, Digger, visited the island of Olib in Croatia.A girl was murdered.The police said it was her boyfriend who stabbed her to death, but Rex and Digger had no doubt they were making a big mistake.Dalton decided to conduct his own investigation and bring the real killer to justice.NO DOUBT is a nail-biting thriller by best-selling author JC Ryan. It is the seventh book in the electrifying new Rex Dalton series.