On the planet Sarpedion, 5000 years ago, Spock knew a beautiful, primitive woman. When the Enterprise is called upon to protect the "Guardian of Forever" - the mysterious portal to the past - Spock uses it to journey to the past. And to discover his own son.
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Science Fiction
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July 1984 : UK Hardback
Title: Yesterday's Son (Star Trek)
Author(s): A C Crispin
ISBN: 0-85997-560-6 / 978-0-85997-560-5 (UK edition)
Publisher: Firecrest Pub.
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Title: Yesterday's Son (Star trek)
Author(s): A C Crispin
ISBN: 0-8398-2830-6 / 978-0-8398-2830-3 (USA edition)
Publisher: Gregg Pr
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January 1999 : USA Mass Market Paperback

Title: Yesterday's Son (Star Trek, No 11)
Author(s): A C Crispin
ISBN: 0-671-03851-6 / 978-0-671-03851-9 (USA edition)
Publisher: Star Trek
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Amazon Amazon UK Amazon CA January 1991 : USA Paperback

Title: Yesterday's Son (Star Trek Novel No. 11)
Author(s): A C Crispin
ISBN: 0-671-72449-5 / 978-0-671-72449-8 (USA edition)
Publisher: Pocket Books
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Amazon UK Amazon CA August 1983 : USA Mass Market Paperback

Title: Yesterday's Son (Star Trek: The Original Series, No. 11)
Author(s): A C Crispin
ISBN: 0-671-47315-8 / 978-0-671-47315-0 (USA edition)
Publisher: Pocket Books
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Title: Yesterday's Son (Star Trek)
Author(s): A C Crispin
ISBN: 1-85286-061-8 / 978-1-85286-061-5 (UK edition)
Publisher: Titan
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Title: St11 Yesterdays Son
Author(s): A C Crispin
ISBN: 0-671-60550-X / 978-0-671-60550-6 (USA edition)
Publisher: Pocket Books
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Amazon CA August 1983 : USA Paperback

Title: Star Trek #11
Author(s): A C Crispin
ISBN: 0-671-66110-8 / 978-0-671-66110-6 (USA edition)
Publisher: Pocket Books
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January 2000 : USA Audio Cassette

Title: Yesterday's Son (Star Trek)
Author(s): A C Crispin
ISBN: 0-671-03810-9 / 978-0-671-03810-6 (USA edition)
Publisher: Simon & Schuster Audio
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Amazon Amazon UK August 1988 : USA Audio Cassette

Title: STAR TREK YESTERDAY'S SON (Star Trek: The Original Series)
Author(s): A C Crispin
ISBN: 0-671-66865-X / 978-0-671-66865-5 (USA edition)
Publisher: Audioworks
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September 2000 : USA, Canada Kindle edition

Title: Yesterday's Son (Star Trek: The Original Series Book 11)
Author(s): A C Crispin
Publisher: Pocket Books/Star Trek
Availability:
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Title: Yesterday's Son (Star Trek: The Original Series Book 11)
Author(s): A C Crispin
Publisher: Pocket Books/Star Trek
Availability:
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