Qianna and her squad of friends are dropping beats in a music studio when a “time quake” erases subway transit, high-speed trains, roller coasters, and other forms of transport that rely on clean electric propulsion in this STEM-inspired graphic novel, part of the Qianna and the Quantum Train series (4 titles). Plenty of action and dialogue guide the story as the squad escapes on a quantum train and travels back to 1885 Brooklyn. A rip between worlds leads them to a bizarre underground city beaming with electricity—and to Granville T. Woods, a once-disrespected but now-revered Black pioneering engineer and inventor with expertise in electricity. From Woods, the squad learns about dynamic electricity, which is reinforced in a concluding explanation of subway cars and their third rail system.