John Stanley Walker, 62, a Washington attorney and coauthor of "The Washington Guide Book," died of melanoma June 28 at George Washington University Hospital.

Mr. Walker, who lived in Bethesda, moved to Washington in 1951 and became counsel to the Joint Congressional Committee on Atomic Energy. In 1953, he went into private practice with what is now Jones, Day, Reavis & Pogue. He specialized in corporation law and was a senior partner of the firm at the time of his death.

He wrote "The Washington Guide Book" with his wife, Katharine.

An enthusiastic tennis player, Mr. Walker was a former president of the Washington Area Tennis Patrons Association, which sponsors the annual Washington Star Tennis Tournament. He also was a former vice chairman of the board of trustees of the Experiemnt in International Living. He was counsel to the National Council of International Visitors.

Mr. Walker was born in Cincinnati and was graduated from Yale University. After World War II service as an officer in the Army Air Forces, he returned to Yale, where he earned a law degree and was elected to the Yale Law Journal. He practiced briefly in New York City before moving to Washington.

Mr. Walker was a member of the International Wine and Food Society and the Metropolitan, Chevy Chase and Edgemoor clubs and Washington branches of Yale alumni groups.

In addition to his wife, of Bethesda, survivors include four sons, Christopher Wetmore, of Middleburg, Peter Crawford, of San Francisco, David Marshall, of Miami and Jonathan Treat, of Boston; his mother, Elizabeth Crawford Walker of Cincinnati; a brother, Richard E., of Beaumont, Tex., and three grandchildren.