Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Unicorns and numbers are definitely the perfect brain boosting combination for teens. You see, you need to take teens out of their comfort zones and give them challenges that you can really complete. Completing Sudoku puzzles gives a strong sense of accomplishment, which translates to happiness. Encourage your teenager to spend some time solving on his/her own. Grab a copy today.