Puffin, New York, 1997, 1^st pr. thus.  ISBN 0-14-037191-5.  Trade soft cover, 72 pages.  Unread copy, remainder mark on bottom edge; black & white illustrations by Lane Smith.  ‘Zapped into the twenty-first century by The Book, Fred, Sam, and Joe find that the future is definitely worth waiting for.  Actually, waiting forever would be okay.  3-D ads attack them on the street.  Ray gun-toting robots demand their ID numbers – or else.  And a meeting with their great-grandkids could knock out the old family tree at the roots.  Will the trio’s future mix-up wipe out their past?  Only the time-warped future will tell!’ (from rear wrap)