New York: Grand Central Publishing, (2019). SIGNED first edition - An exploration of what might be "out there" arranged in a simple question-and-answer format, with answers in "an informal but informative style, which mixes in a healthy dose of humor and pop culture to make big ideas easier to swallow. Dr. Wall covers questions far beyond alien life, venturing into astronomy, physics, and the practical realities of what long-term life might be like for we mere humans in outer space, such as the idea of lunar colonies, and even economic implications." SIGNED on the title page and dated in the year of publication. Bibliography. viii, 237 pp.