Next time you travel on the Tube—London's wonderful warren of underground stations—pick up a new pocket map which is graced with a grand design by the Argentine artist Pablo Bronstein. Commissioned by Art on the Underground, the striking cover image shows the entrance of a Tube tunnel transformed by a palatial Baroque clock. "For this commission I began to think of the Tube network as a similarly complicated machine in which the different parts need to be working as a whole. The clock I have drawn is rather theatrical, and I wanted it to contrast with the practical Modern design frequently used on the Underground," Bronstein says (commuters will never see the Victoria Line in quite the same way again).