Librería Samer Atenea
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
What’s the difference between a delver and a private detective? Tim Brown is about to try to find out, as a challenge lands on his desk. It’s the reverse of a locked-room puzzle, since not just a room but a whole building seems to have disappeared.