Testing the Limits: Aviation Medicine and the Origins of Manned Space Flight Volume 15 - Paperbackby Maura Phillips Mackowski (Author) ". . . a brilliant piece of scholarship . . . Mackowski's book belongs in every space historian's library. Seldom does one find in scholarly literature a book as easy and enjoyable to read as Testing the Limits." Air Power History "Maura Phillips Mackowski has filled a critically important gap in the literature of American aerospace history. . . . The author provides a compelling narrative overview of the