Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Don’t get frustrated if it’ll take an hour or two to complete a single puzzle. You are training your brain to work in a new way and of course, an adjustment period is needed. If you keep working on Sudoku puzzles, it will take less time to solve each puzzle. Don’t you just love Sudoku?