The Crucible: An Autobiography by "Colonel Yay", first published in 1950, is the dramatic firsthand memoir of Filipina-American Yay Panlilio's (1913-1978) time in the Philippines with the resistance group known as "Marking's Guerrillas." The book includes descriptions of encounters with the Japanese army, espionage, sabotage, constant moving to avoid capture, torture and execution, communication with Allied forces, the struggle to obtain adequate food and medical supplies, and also the romance between Yay Panlilio and former boxer Marcos Augustin, the determined leader of the guerrilla force (and Yay's future husband). In 1945, Ms. Panlilio returned to the U.S. With her children. Overall, an insightful and moving account of the day-to-day struggles of a brave band of Filipino fighters against a brutal, uncompromising opponent.