The House of Storms — T. Austin Campbell

The System is a universe of alternate realities; its purpose remains enigmatic. Captives are thrown from one harrowing venue to another while they try to learn the purpose of The System and to escape from it. System captives risk their lives as they pursue bank robbers in Victorian Vancouver, escape psychopaths in a sinister amusement park, partner with alien shape-shifters to capture an intergalactic thief, capture plane hijackers in modern Hong Kong, escape from 1930s Maoist China, and more.