"The Secret History of Twin Peaks" is a novel written by Mark Frost, which serves as a companion to the cult television series Twin Peaks. The book delves into the mysterious events surrounding the fictional town of Twin Peaks, Washington, exploring its history, key characters, and supernatural elements. It is presented as a dossier filled with documents, photographs, and narratives that reveal hidden connections and secrets. The story spans several decades, from the early 20th century to the events of the original series. It introduces various characters, including Agent Cooper and Laura Palmer, while also examining the influence of the Black Lodge and other supernatural forces. The novel enriches the lore of the series, providing fans with deeper insights into the enigmatic world of Twin Peaks.