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.