<div>The biography of Rosalyn Yalow, as told by her longtime friend and colleague Eugene Straus, is the story of a woman who prevailed against class and gender prejudice to reach the pinnacle of the science world. Yalow&#8217;s story is related against the backdrop of her later years, when, after having won the Nobel Prize in medicine for inventing a revolutionary test for certain kinds of hormones, she was suddenly felled by a stroke and brought to a hospital where, unrecognized, she was &#8220;dumped&#8221; as a charity case onto another hospital. Straus&#8217;s account of Yalow&#8217;s slow but ultimate triumph over crippling illness is of a piece with that of the dazzlingly talented and tenacious young woman who, despite the barriers placed before her by a male-dominated medical establishment, never compromised her principles of hard work and scientific integrity.</div>