Last Call of Mourning — Charles L. Grant

Upon returning home to Oxrun Station from travelling Europe, Cynthia Yarrow notices that her family has changed. Her Mother cuts herself but does not bleed. Her Father lay dead before her eyes but is alright just hours later. Cynthia's suspicions lie with her family's new doctor, Dr. Kraylin. With her friend from years back, Ed, Cynthia must solve this mystery or die trying.