As suicides among members of the U.S. military and veterans continue at a rate higher than in the general population-at least 22 each day-and their calls for help become more tragically blatant, with three veterans waiting for treatment outside Veterans Administration hospitals in 2019 committing suicide there - the authors, former US Marines, call for a new approach to help halt the needless deaths. They detail a plan to establish preventative training for mental fitness that will help psychologically "vaccinate" service members against depression and PTSD, the most common precursors to suicidal thoughts. The book describes their mental fitness training program to shift from post-trauma treatment to pre-trauma prevention. Topics are illustrated with stories from veterans. Part of the solution offered is to present prevention as something for all service members, and as a positive, strength-building, challenging activity for champions, as opposed to a post-trauma treatment only.