Claim: Grace Hallock was an American children's writer who published books explaining health and science issues.
Evidence: Grace Taber Hallock (April 10, 1893 – August 17, 1967) was an American children's writer of the early to mid-20th century. Many of her books explained health and science issues, including Florence Nightingale and the Founding of Professional Nursing and Marie Curie (both published by the Metropolitan Life Insurance Co. as part of a series called Health Heroes).