Dark Shadows Collection Volume 11

Barnabas, Quentin and the Hidden Tomb (December 1971)
Ellen awoke to see a ghostly figure moving through the shadows to her bedside.

 "Ellen!" Her name was whispered hoarsely, but she recognized the voice. It was Aunt Kate's. 

"What's wrong?" Ellen asked, getting out of bed. 

"Dying…"

 Ellen sprang to her and eased her aunt down on the bed. "What is it?" 

 "Danger… vampire."

Ellen found matches and lit the candle on her bedside table. As she studied her aunt's death-like face in the flickering light she was appalled. "I must rouse the others and get a doctor!"

"Too late," Aunt Kate whispered. "I'm dying. Don't stay here. Find Barnabas… leave tonight."

Barnabas, Quentin and the Vampire Beauty (March 1972)
While on a ski vacation in Switzerland, beautiful model Adele Marriot meets Dr. Stefan Soivak. He tells her of his discovery of an operating technique that will keep her forever thin. Adele agrees to have the operation and enters the doctor's clinic.
 
Once there, Adele realizes she is virtually a prisoner. Against her will, she undergoes the operation. When she recovers she finds she has been used for evil purposes. To cure one of his wealthy vampire patients, the evil doctor has turned Adele herself into one of the living dead.
 
 Adele manages to escape and flees to Collinwood to gain the help of Barnabas and Quentin Collins. Little does she realize that by doing so she places herself and her two friends in the worst danger of their strange lives.