The medium has the message"Who did this to you, Adam, and why?" is Nell's beseeching plea to her husband, killed with four others when his boat was blown up in a New York City harbor. Can he somehow come back to tell her what happened? Can she solve the mystery of the explosion, find peace for Adam's soul, and build a new future for herself? The answers to these questions, and a grippingly good tale, are in Mary Higgins Clark's current bestseller, Before I Say Good-bye (abridged, $25, ISBN 0671047876). America's undisputed "Queen of Suspense" delves into spiritualism and communication from another plane, as she follows Nell's determined search for the truth, a search that just may put her in deadly jeopardy. As always, Clark draws appealing characters, sets an accurate scene, gets the details right, and adds a hint of romance to keep your interest level high. Broadway actress Jan Maxwell reads both the long and short versions with compelling competence.