"1123128247"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Donald Nardo (born February 22, 1947) is an American historian, composer, and writer. With more than five hundred and forty published books, he is one of the most prolific authors in the United States, and one of the country's foremost writers of historical works for children and teens."@en . "Don Nardo"@en . "29063"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "23131596"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Donald Nardo (born February 22, 1947) is an American historian, composer, and writer. With more than five hundred and forty published books, he is one of the most prolific authors in the United States, and one of the country's foremost writers of historical works for children and teens."@en .