Neither cybercrime nor the darknet are straightforward – they are a morass of contradictions and grey areas. Cybercriminal activity occurs on the surface net: harassment, copyright infringement, fraud, subversion, sabotage and terrorist propaganda. But although these actions are illegal, are some of them legitimate? Those who believe information should be free oppose copyright laws, while cyber subversion and sabotage can help topple authoritarian regimes; they were vital catalysts in the 2010–11 Arab uprisings. Cath examines some of these complexities in the book.