Ruy Castro's newest work, "Tropical Trench" (the subtitle means "World War II in Rio"), delves deep into the effects of the Second World War not just on Rio de Janeiro, but on Brazil as a whole during the early to mid-20th century. While the title suggests a focused narrative, Castro expands the conversation to cover a range of experiences across the country, including significant attention to Brazilian soldiers who fought in Italy.

Throughout the book, Castro vividly details how the war changed everyday life for cariocas, encompassing themes such as espionage, rationing, and the implementation of blackouts. He shares anecdotes that bring this history alive, including clever etymological insights into how the term “submarine races” originated from couples courting in their cars during the darkened streets of Leme and Arpoador under the pretense of coastal surveillance. This blend of personal stories and historical facts creates an engaging narrative that highlights the resilience of the Brazilian people during a tumultuous era.

In addition to the social aspects, Castro discusses the political climate of the time and the contributions of significant literary figures such as Stefan Zweig and Georges Bernanos, who were exiled in Brazil. The book showcases not only the cultural richness of the country during these times but also the complex interplay of war and everyday life, making it a compelling read not just for history buffs but for anyone interested in Brazilian culture and its evolution during the 20th century.