Cordelia Gray Series by P.D. James, Katie Scarfe

Meet Cordelia Gray: twenty-two, tough, intelligent and now sole inheritor of the Pryde Detective Agency. Her first assignment finds her hired by Sir Ronald Callender to investigate the death of his son Mark, a young Cambridge student found hanged in mysterious circumstances. Required to delve into the hidden secrets of the Callender family, Cordelia soon realises it is not a case of suicide, and that the truth is entirely more sinister.

Private detective Cordelia Gray is invited to the sunlit island of Courcy to protect the vainly beautiful actress Clarissa Lisle from veiled threats on her life. Within the rose red walls of a fairy-tale castle, she finds the stage is set for death.