Weep No More My Lady by Mary Higgins Clark

Elizabeth Lange has arrived at an exclusive spa in Pebble Beach, California, weary of heart and soul. Still grieving for her beloved sister, a famous actress who plunged to her death from her Manhattan penthouse, Elizabeth is determined to unearth the truth about how Leila died. Accused of the murder is international celebrity Ted Winters, Leila's dashing fiance. The chief witness for the prosecution is Elizabeth Lange. Attempting to relax before the trial, Elizabeth is confronted by a cast of characters who all had cause to love - or hate - Leila La Salle. And one of them is determined that she will not live to testify...