Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
This book begins with the basic techniques needed to get started in Sudoku. It then progresses through a total of 50 techniques - building up a toolkit of techniques, strategies and training methods that will, if you master them, enable you to become a top player.