The first volumes in this series came out in Apr, 2021. With the "Have a Ball with Pencil Puzzles" series, you can enjoy Sudoku, Kakuro, and Slitherlink. The titles in this series show the Have a Ball with Pencil Puzzles in the volume, and a volume has about 90 puzzles ranging from easy to hard.
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.