Masutatsu Oyama (大山 倍達 Ōyama Masutatsu, July 27th, 1923 – April 26, 1994), more commonly known as Mas Oyama, was a karate master who founded Kyokushinkai Karate, considered the first and most influential style of full contact karate. He was born Choi Yeong-eui (Korean: 최영의 in Korea, Hanja: 崔永宜). A Zainichi Korean, he spent most of his life living in Japan and acquired Japanese citizenship in 1964. He is an alumnus of Waseda University in Japan.
Great book that details very clearly and with a lot of detail basic kyokushin techniques, useful for every karate practitioner and written by the man himself.