Cities of Light, a collection of science fiction, art, and essays about “how the transition to solar energy will transform our cities and catalyze revolutions in politics, governance, and culture.” The book is a collaboration between Arizona State University and the U.S. National Renewable Energy Laboratory. It explores solar futures in four U.S. cities: Chicago, Illinois; Portland, Oregon; San Juan, Puerto Rico; and San Antonio, Texas. Cities of Light features fiction by Paolo Bacigalupi, S.B. Divya, Deji Bryce Olukotun, and Andrew Dana Hudson, and essays by experts in fields ranging from electrical engineering and data science to sociology, public policy, and architecture. The book is free in a variety of digital formats. You also can order print-on-demand copies.