Here you can download the Sudoku Instruction Booklet for WPF Sudoku GP8 (Japan):
Sudoku Booklet (pdf - 1 495 kB)
Save the puzzles into your computer. Click the right button and save / save as
PLEASE NOTE: The instructions for Arrow Sudoku (no. 7) are wrong. It´s a standard puzzle with the usual wording: Apply classic sudoku rules. The number placed in a cell with a circle must be the sum of the numbers placed in cells the adjoining arrow passes through. Numbers may repeat on arrows.