Maclean's fifth book, "River of Fire: The Rattlesnake Fire and the Mission Boys," (2018) brings up to date his account of the 1953 fire that killed 15 firefighters in northern California, 14 of them members of a missionary fire crew, that he first chronicled in "Fire and Ashes." Following publication of that first account, the site of the fire was reclaimed and turned into a living memorial, with key points located as guides for learning. Many families and friends rediscovered those who were lost . The arsonist who started the fire and was imprisoned for it, Stan Pattan, whom Maclean located, interviewed, and corresponded with for many years, died without an obituary, until this volume was published.