Ancient world adventure, emotions affecting racial relationships, ethics in medical research and changing family values will be among the topics discussed by Gore Vidal, Toni Morrison, Robin Cook and Evan Hunter at The Washington Post's Book and Author Luncheon April 7 at the Sheraton Washington Hotel.

Vidal's most recent novel, "Creation," is an epic tale of the fifth century B.C. written in the tradition of his previous historical novels: "1876," "Burr" and "Julian." Toni Morrison, a National Book Critic's Circle Award winner for "Song of Solomon," has recently published "Tar Baby," a novel examining the racial and human relationships between six people on a Caribbean island.

Cook's latest novel, "Brain," is a thriller set in an urban hospital much like his best-selling novel "Coma." "Brain is another view of medical ethics gone awry. Cook is also a practicing ophthalmologist in Boston who says that a significant minority of research involving humans "is frightening and demands attention from the public."

"Love, Dad," a story of love and conflict between a father and his teenage daughter, is the latest work by Evan Hunter, best-selling author of "The Blackboard Jungle."

Washington Post Managing Editor Howard Simons will preside at the luncheon. Tickets are $12.50 each and are available at the Post's front counter at 1150 15th Street, N.W. and at selected downtown and surburban bookstores. For more information, call the Public Relations Department at 334-7971.