What if the Mandela Effect isn't a flaw in human memory? What if it is evidence that someone has been changing history?History Engineers: P-47 / P-52 is a science-fiction conspiracy thriller inspired by real events, documented phenomena, and controversial scientific questions.When doctoral researcher Evan Mercer becomes involved in an experiment that produces results that should be impossible, his mentor, Professor Adrian Kade, reacts with something Evan has never seen in him before: fear.Then Kade disappears.The evidence explaining his disappearance is almost perfect.Too perfect.With investigative journalist Maya Rhee, Evan begins pulling at threads that were probably meant to remain untouched. Scientists who died or vanished. Controversial experiments. Strange astronomical anomalies. Government secrecy. UFO and UAP encounters. The Mandela Effect. And references to two impossible designations: P-47.P-52.At first they appear unrelated.They aren't.The deeper Evan and Maya investigate, the more dangerous the question becomes: What if UFOs were never what we thought they were? What if the changes people remember actually happened? And what if someone has been engineering history for much longer than anyone realizes?Every answer pushes them closer to the line between discovery and death-and toward something far larger than a conspiracy.Because science can save humanity.It can also become a weapon powerful enough to destroy it.Perhaps it already has.Many times.And perhaps it will again.After reading History Engineers, you may find yourself looking differently at the Mandela Effect, UAPs, scientific experimentation-and reality itself.