Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
How long have you been thirsting for tempting, tantalizing teasers, craving for challenging cryptographic conundrums? A sequel to ''Have Some Sums to Solve'', this work can satiate the desires of even the most prolific puzzle enthusiast.