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Hugo Award nominated novelette. It originally appeared in If, December 1958. The story can also be found in the anthology Introductory Psychology Through Science Fiction (1977), edited by Patricia S. Warrick, Martin H, Greenberg and Harvey A. Katz.

Involuntary Immortals is the story of a woman who finds herself outliving her lovers and the incredible peril she faces when she sets out to discover the source of her involuntary immortality. Helen Ranston discovers her own daughter Agnes thinks she is a witch or vampire. Agnes is 40, but still looks 20 and has never aged throughout her daughter's entire life. Even Agnes doesn't suspect the truth - that Helen is over 100 years old - and has no idea why she is apparently immortal. With her daughter vowing vengeance, Helen knows she will have to start her life over under a new identity, as she has so often before.

Then, she meets the young man with the figure-eight pin on his collar. Looking at him, Helen discovers his eyes are those of a much older man. When Eric Trent says, "You never thought there would be others," he catapults Helen into the midst of a lethal three-corner cat-and-mouse game, the pawn of ruthless schemers who know how to kill immortals and are willing to kill every one of them in order to control the priceless secret of selling eternal life!

Can Helen keep her immortality, or will she lose it - and her life along with it?

Contents:

• 3 - The Yellow Pill - (1958) - short story
• 12 - Step Out of Your Body, Please - short story (variant of "Step Out of Your Body, Please!" 1951)
• 22 - Let Freedom Ring! - (1945) - novelette
• 40 - Vampire of the Deep - (1951) - short story
• 53 - Destiny Uncertain - (1952) - novelette
• 71 - The Pranksters - (1950) - short story
• 71 - The Pranksters - (1950) - interior artwork by W. E. Terry
• 80 - You'll Die Yesterday - short story (variant of "You'll Die Yesterday!" 1951)
• 92 - The Only One That Lived - (1959) - short story
• 101 - The Lost Bomb - (1950) - novella
• 130 - The Old Martians - (1952) - short story
• 139 - Captain Peabody - (1957) - short story
• 149 - The Lost Ego - (1953) - novelette
• 164 - The Venusian - (1948) - novella
• 202 - Hate - (1948) - novelette
• 227 - The Supernal Note - (1948) - short story
• 234 - Truckstop - (1957) - short story
• 241 - The Gallery - (1959) - short story
• 251 - In the Twinkling of an Eye - (1954) - novelette
• 270 - Your Funeral Is Waiting - (1953) - novelette
• 281 - Atom War - (1946) - novelette
• 295 - Prophecy, Inc. - (1958) - short story
• 304 - Space Is for Suckers - (1958) - novelette
• 312 - Executioner No. 43 - (1957) - short story
• 318 - The Lady Killer - (1953) - novelette