Peter Levenda has spent more than thirty years investigating the connections between occult history, intelligence operations, and the events that shaped the modern world. He is the author of more than twenty books, including Unholy Alliance, the Sinister Forces trilogy, and the Secret Machines series co-written with Tom DeLong. His work draws on primary documents, national archives, and firsthand research across four continents. He is known for finding connections between subjects that most researchers treat as separate — Nazi occultism, the Kennedy assassination, CIA mind control programs, UFO phenomena, and the hidden religious networks that ran through all of it.