While imperfectly written, edited, and somewhat repetitive, the authors make a case that scientific inquiry in the US into UFOs/UAP in the past was systematically hidden by the military from public view, but also deliberately undermined publicly with ridicule, minimization, or sidelined evidence. They also state that prominent debunkers like Donald Menzel and Philip Klass were unscientific and worse, compromised; Menzel by clandestine connections and ongoing work with intelligence agencies, while Klass had personal biases and preconceived agendas to destroy the character of any reportee or researcher in the topic, especially against one of the authors. Their archival research seems solid. The bigger problem with this topic is that mostly anecdotal evidence and case studies exist as proof. Sightings reported by credible and experienced observers are still subjective and hard to satisfy the extremely high standards of proof required for such a controversial topic. Even with a consistent pattern of unexplainable unknowns appearing even in recent times, there is no way to truly understand what is actually happening, especially if a large subset of evidence is possibly squirreled away into archives of military secrets, as claimed by the authors. One can only hope that with the new effort by the US Congress at delving into the issue, perhaps more concrete evidence will come to light somehow and the authors' claims can be settled once and for all.