KenKen is the brilliant successor to Su Doku that's taken Japan by storm. In collaboration with The Times, Collins - the no 1 puzzle publisher - are proud to publish it in the UK.

Tetsuya Miyamoto established his own maths class in 1993 and is the founder and instructor of his own maths class in Yokohama, Japan. He pioneered the national success and popularity of the KenKen puzzle in Japan. He spent years inventing KenKen and other puzzles which he has used in his class to strengthen the 'thinking habits' of his students. He is the author of the Japanese books translated as 'The Art of Teaching Without Teaching Books 1 & 2' which introduce his unique educational methods and beliefs. He has regular columns in several Japanese monthly magazines such as 'Maths for Middle School' and 'Maths for High School'. He regularly lectures to educators and parents in Japan.