Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
This is a collection of Paddocks puzzles (as seen in The Guardian). They are a new and addictive type of logic puzzle. They range from Easy to Genius level. Also included are a selection of other logic puzzles to try.