The patient sniper

The city walls are a battlefield in this book by renowned author Arturo Pérez-Reverte. Lex, a PhD in art history and an expert in urban art, receives a call from a publisher with a tempting job offer: locate the graffiti artist Sniper and present him with an offer he can't refuse, involving incalculable fame and fortune. However, there's a problem. The identity of the greatest graffiti artist the world has ever seen, with work spread throughout Europe and even the Americas, capable of mobilizing crowds of urban artists by proposing challenges involving urban artistic interventions in risky places, is completely unknown, and no one knows his whereabouts. So Lex must travel through several European cities in an attempt to find one of the most famous and least accessible men in the world.