Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Did Level 1 Sudoku fail to give you the challenge you need? Well then you better give this challenging book a try! You'll have to spend more time in finding the patterns in each of the puzzles in this book. A lot of thought will be require to complete each round. The first few tries will throw you off guard but keep coming back to work harder.