The Iraqi invasion of Kuwait will undoubtedly spawn numerous books on Iraq and its enigmatic president. This "instant" book written in 21 days by Miller ( New York Times ) and Mylroie (Harvard Univ.) attempts to combine historical analysis with timely journalistic reporting to provide the general reader with an informed analysis of the current crisis in the Gulf. The authors describe Saddam Hussein's meteoric rise to power in a lucid and easy-to-follow style. Although this book is recommended for general readers and public libraries, those interested in a more in-depth study of today's Iraq should consult Sad dam's Iraq: Revolution or Reaction? (Zed Bks., 1989) by the Committee Against Repression and for Democratic Rights in Iraq.- Nader Entessar, Spring Hill Coll.