OOverworked and Underpuzzled : Killer SudokuOverworked and Underpuzzled : Killer Sudokude Tim DedopulosEdiciones (1)Overworked and Underpuzzled : Killer Sudoku (2020)Welbeck Publishing Group Ltd. · inglés · ISBN 9781787393837Más obras de Tim DedopulosVVelhotVelhotEl libro de los enigmas de J.R.R. Tolkien