Download or read book Yesterday's Son written by A.C. Crispin and published by Simon and Schuster. This book was released on 2000-09-22 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Romulans attack the planet Gateway, where Federation scientists are studying the Guardian of Forever -- the mysterious portal to the past. The Starship Enterprise™ must protect the Guardian -- or destroy it. But Spock has already used the portal to journey to the past. On the planet Sarpedion, 5,000 years ago, Spock knew a beautiful, primitive woman. Now he has gone back to meet his son!