Dead West by Matt Goldman

Private detective Nils Shapiro is hired by wealthy Beverly Mayer to check in on her grandson, Ebben, who lives in Los Angeles. Beverly is afraid that Ebben is squandering his inheritance. The sudden death of Ebben's fiancee Juliana, has made Beverly even more concerned. Minneapolis born and bred, Nils is not used to the California lifestyle, but he does take a liking to Ebben. When Nils realizes that Juliana was murdered and that the real target was Ebben, he decides that he needs to get to the bottom of the case. Dead West is the fourth book in the Nils Shapiro series and is very similar to the Myron Bolitar series by Harlan Coben.