Born in Pittsburgh, Pennsylvania in Frank Klaus was a German-American boxer. His professional career spanning 39 matches netted 32 wins 21 by KO. He won the Middleweight Championship of the world in 1913 and was elected to the Ring Boxing Hall of Fame in 1974. Acclaimed as an inside fighter, in approximately late 1913 or some time thereafter he penned his book of instruction on in-fighting. Klaus packs a great number of photograph into his work for such a comparatively short and focused book: 27 in all including several “action shots” from his fights giving this book a ratio of about 1 photo for every 2 ? pages of instruction. Particular gems include “The Liver Punch,” “Feigning ‘Grogginess’,” and “Beating an Opponent by Punching his Gloved Hands or Arms.”