This book contain 504 puzzles named futoshiki with solutions. It's a part of "9 Dimension Series" books. Each futoshiki is 9x9 size.

This book contain 504 puzzles named kuromasu with solutions. It's a part of "9 Dimension Series" books. Each kuromasu is 9x9 size.

This book contain 504 puzzles named nurikabe with solutions. It's a part of "9 Dimension Series" books. Each nurikabe is 9x9 size.

This book contain 504 puzzles named shikaku with solutions. It's a part of "9 Dimension Series" books. Each shikaku is 9x9 size.