"Richmond Tales: Lost Secrets of the Iron Triangle" written by Summer Brenner, with illustrations by Miguel Perez.
When Maisha and Mario become friends, their adventures takes them on a journey to discover the "lost secrets" of the Iron Triangle, a district of Richmond, California. Their journey takes them back to Richmond in Ohlone times before the Europeans arrived; Richmond in 1915 when it was a small, bustling, industrial city; Richmond in 1942 when World War II and the Home Front dramatically changed Richmond and created one of the largest ship-building centers in the nation; and forward into Richmond of the future after Maisha and Mario have grown up and helped make the city a beautiful, peaceful place to live.