Kammala jumla mai zuwa: Bayan yin ritaya daga aikin shekaru hudu a aikin likita, Lowry <unk> ya taimaka wa sabon matarsa, Beverly <unk> ya canza a cikin shekarun 1990 zuwa rubuce-rubuce na tarihin tarihi. Ya rubuta ko kuma ya rubuta littattafai fiye da 20 a wannan fagen, mafi yawan abin da ya shafi lokacin yakin basasar Amurka. An gudanar da yawancin binciken Lowrys a cikin Tarihin Tarihi na Amurka a Washington, DC, inda, a cikin shekaru goma, Lowrys ya tattara babban kundin dubban takardun yakin basasa da ba a riga an tsara su ba. Littafin farko da aka fi sani da Lowry a kan wannan batun, "Labarin da Sojoji ba za su ba da labari ba" (1994), ya sami kyakkyawan bita a cikin "The New York Times" a matsayin "na farko na nazarin halayyar jima'i da ke da alaƙa da Yaƙin Basasa", kuma an yaba shi a cikin "Esquire" a matsayin "mai ban sha'awa da ban sha'awa". Ayyuka biyu na gaba a kan kotun kotun yakin basasa, "Tarnished Eagles" (1998) da "Tarnished Scalpels" (2000; wanda aka rubuta tare da Jack D. Welsh), an sake nazarin su a cikin "Civil War Times" da "Kirkus Reviews", bi da bi. Lowry ya wallafa lokaci-lokaci a kan wasu abubuwan tarihi, irin su
Yaƙin Taranto da nutsewar "Titanic". Littafinsa na 2004 game da Lewis da Clark Expedition ya sami lambar yabo daga Lewis da Clark Trail Heritage Foundation.