When a January 2025 traffic stop near the Canadian border ended with two people dead, investigators uncovered connections reaching far beyond a lonely Vermont highway. At the centre of the expanding investigation was Jack LaSota, an online writer known as “Ziz,” whose controversial ideas attracted a small circle of intelligent, unconventional, and increasingly isolated followers and friends. Journalists and authorities began calling them the Zizians. Some described them as a dangerous cult. Their lawyers and associates rejected the label, arguing that separate people and events had been forced into one sensational story. The Rationalist Case Files follows the disturbing chain of events surrounding this secretive network: a protest against a rationalist organisation, an experimental community built around boats and converted vehicles, a violent landlord dispute in California, the unexplained deaths of a Pennsylvania couple, the killing of a crucial prosecution witness, a fatal encounter with federal agents, and arrests in the Maryland woods. Drawing carefully from court proceedings, public records, published writings, investigative reporting, and competing accounts, this book asks the questions behind the headlines: Who was Jack LaSota, and how much influence did Ziz truly have? Were the Zizians a cult, an extremist network, a collection of troubled friends, or something more complicated? Did one ideology connect the violence, or did the public mistake association for coordination? And what happens when intellectual certainty, personal isolation, and unquestioning loyalty begin to replace outside reality? This is not a story with a simple conclusion. Several defendants have pleaded not guilty, major allegations remain unresolved, and future trials may transform what is currently known. Carefully separating documented facts from accusations, speculation, and sensational labels, The Rationalist Case Files is a compelling investigation into online influence, fractured families, hidden relationships, and the dangerous territory between belonging and control.