Graded Go Problems for Beginners,: Volume Two Elementary Problems 25-kyu to 20-kyu: Volume 2

Yoshinori Kano was born on April 28, 1928 in Kyoto, Japan. He went to Tokyo at the age of nine ad became a disciple of Hideko Suzuki, 5-dan. He became 1-dan in 1943 and in 1968 he attained the top rank of 9-dan. In1948 he won the Young Professional's Championship, in 1955 he won the top section of the Oteai, and in 1961 he won the 5th Prime Minister's Cup. He has played in the 14th, 20th, 25th, and 16th Honinbo leagues. He graduated from the Japanese Literature Department of Japan Uniersity, making him one of the few professional go players to have graduated from university.

Richard Bozulich was born in Los Angeles in 1936. From the age of four until 17 he studied to become a concert pianist. He then studied Mathematical Logic at UCLA from 1953 to 1956 under Richard Montague.. He transferred to UC Berkeley and graduated in mathematics in 1966. In 1967 he went to Japan to study go. In 1968 he founded Ishi Press Inc. in Japan and published more than 45 books on go. In 1982 he founded Kiseido Publishing Company and has published more than 60 book on go under that company. He started publishing a go magazine, Go World, in 1977. 129 issues were published until he stopped publishing it in 2013. He is said to be the most prolific writer of English-language go books, having written or translated almost 50 books on the game He lives in Chigasaki, Japan and is the president of Kiseido Publishing Company.