Percy Guzman Montero is a Costa Rican author and researcher based in the United States. He currently works at the Helen F. Graham Cancer Center & Research Institute, where he contributes to research on cancer disparities, diagnostic intervals, and treatment delays. From 2021 to 2025, he served at the National Cancer Institute (NCI), working with the Cancer Prevention Fellowship Program (CPFP) and the Health Assessment Research Branch within the Division of Cancer Control and Population Sciences. His scientific background has led him to publish peer-reviewed articles in cancer epidemiology and public health, with recent work examining cancer incidence and mortality trends in Costa Rica.

His debut historical novel, The Scent of a Bullet: The History of Don Pepe, explores the Costa Rican Civil War and the life of President José “Don Pepe” Figueres, shedding light on lesser-known aspects of the country’s democratic transformation. He is also the author of its sequel, Forgotten Heroes (Héroes Olvidados: La Historia de Don Pepe), a work that highlights the resilience and sacrifices of the men and women who fought alongside Don Pepe, adding human depth to the nation’s journey toward democracy.

Percy is currently writing The Last Shadow of Franklin D. Roosevelt, a literary project that blends historical accuracy, poetic language, and symbolic depth to portray the president’s final hours, intertwining medical reality with lyrical introspection. In parallel, he is developing The Shirtmaker of Missouri, an essay that offers a symbolic and introspective exploration of President Harry S. Truman, his rise to power, and the burden of the atomic decision.

Alongside his creative work, Percy continues his scientific research and writing, integrating rigorous methodology with narrative craft to illuminate both historical and human truths. His mission as a writer and researcher is to merge science, memory, and literature to preserve voices often overlooked by history.