Now in paperback, osem kniha bestselling Rivers of London série odpovedajú na dobrodružstvo Peter Grant, detektívne a učenia wizard, as he solves magických crimes v meste London. Peter Grant je stvorený fatherhood, a na necertifikovanom future, s ekvalizérmi panike a enthusiasm. Rather than sit around, he takes job s emigré Silicon Valley tech génius Terrence Skinner's zbrusu nový London štart up-the Serious Cybernetics Company. Drawn do orbity Old Street's famous 'silicon roundabout', Peter musí učiť, ako sa blend v s ľuďmi, ktorí sú ako civilistov a geekier than he is. Compared to je last job, Peter thinks it should be a doddle. Ale magic nie je finished s Mama Grant's favourite son. Because Terrence Skinner má tajné zakryté v bowels of the SCC. A technológie, ktoré stretches back to Ada Lovelace a Charles Babbage, a smerom k future of artificial intelligence. A secret, ktorý je just as magical as it technological a just as dangerous.