Your body & how it works by John Drury Ratcliff

Beginning with the publication of “I Am Joe’s Heart” in 1967, J. D. Ratcliff’s fascinating articles about the human body quickly established themselves as the most successful series ever run in Reader’s Digest. Over the years, the magazine has received four million requests for reprints of individual articles. (…) Now the entire series is available in one convenient volume, fully illustrated and arranged in a logical sequence. — archive.org

Published by reader Digest Press / Delacorte Press, 1975.