Volume 7 of the series of books with the most difficult variant of Sudoku... Killer Samurai Sudoku! In this new volume, there are:
75 Killer Samurai Sudoku
15 Frame Killer Samurai Sudoku
and 10 Multi Samurai Loco Sudoku puzzles!
So, again, there are some novelties which you will surely like. These puzzles come from Djape, the author of Sunday's Samurai Sudoku for The Washington Post.