There are now three new books, "Kind & Friendly Sudoku 4," "Kind & Friendly Kakuro 4," and "Kind & Friendly Slitherlink 4". They are in the "Kind & Friendly Puzzle Book" series, a new pencil puzzle book series. Each book contains about 100 puzzles.
A lot of people enjoy solving puzzles every day to escape the pressures of the world. With Nikoli logic puzzles you need just paper, pencil, and an active mind, no expensive programs or training......
The first puzzle magazine in Japan was published in August, 1980, this magazine was "Nikoli." So, yes, we are the pioneers in this field in Japan. Nikoli is now the company "NIKOLI Co., Ltd."
Since that first magazine, we have been publishing puzzle magazines and books and supplying original puzzles to other publications (newspapers, weekly and monthly magazines). We are constantly studying and inventing new puzzles and have created over 200 kinds of original puzzles.
We confidently assure you that among Japanese puzzle solvers, Nikoli stands for fantastic puzzles.