Avon, New York, 1999, 1^st pr.  ISBN 0-380-79969-3.  MMPB, 245 pages.  Unread copy with a bit of edge and cover wear; pages tanning.  ‘In the year 2345, young heroes yanked from the 20^th century and beyond must fight an enemy more skilled, cunning, and dangerous than they ever imagined.  But these young heroes are the world’s only hope …’ (from rear wrap)