EXOPLANETS: Diamond Worlds, Super Earths, Pulsar Planets, and the Search for Life Beyond Our Solar System. Michael Summers and James Trefil. This isn’t your grandfather’s galaxy (the theme of this book’s first chapter), and Summers (an astronomer) and Trefil (a physicist and prolific author) here give us an up-to-date look at one of the liveliest and most exciting set of topics in modern science. New discoveries of planets beyond our solar system come almost every day. The authors give insights, discuss the challenges and issues, and argue that the richness and complexity of the worlds we are now finding require we rethink our place in the universe, because it is stranger and far more wondrous than we could have imagined. Smithsonian Books, 2017, 218 pp., $29.95.