“Sudoku Strategy Guide (Revised Edition)”
This is a revised edition of the “Sudoku Strategy Guide” published by Nikoli in 2007. It will satisfy everyone from beginners to those who want to be able to solve more difficult problems.

“Have a Ball with Pencil Puzzles – Numberlink 1”
This book contains over 90 numberlink puzzles ranging from easy to hard.

“The Pencil Puzzles 2025”
The Pencil Puzzles 20xx series are the renewal versions of our best sellers “Penpa 20xx” series. The book contains about 260 number puzzles, includes English explanation.

“Puzzle Communication Nikoli Vol.188”
Nikoli is the most advanced pencil puzzle magazine in Japan. The first issue was published in August, 1980.

“Enjoyable and doable! Easy Sudoku”
contains 75 easy sudoku problems for beginners.

“Sudoku Communication Vol.47”
is a biannual Sudoku magazine with over 100 puzzles ranging from easy to hard. It also has a few puzzles other than Sudoku and articles related to Sudoku.

“Otegaru Suiri Puzzle (Logic Puzzle)”
This volume contains over 50 Logic Puzzles from “Sudoku & Logic Puzzles for Home” Vol.1 to 4.

“Puzzle the Giants Best Selection 5”
contains carefully selected giant-size puzzles from “Puzzle the Giants” Vol.23-26. You can enjoy over 30 types of puzzles, about 120 in total. Please note that some of the puzzles are in Japanese.

“Sudoku & Logic Puzzles for Home Vol.8”
contains about 80 puzzles, mainly Sudoku and Logic Puzzle.

“ChoGekikara (Really really hard) Sudoku 15”
contains 91 sudoku puzzles.