Writing, KSP (why else am I here?), Spaceflight (crewed and robotic), Astrobiology and the search for habitable exoplanets, Interplanetary travel and colonization, Interstellar travel, and watching or reading plenty of science fiction and fantasy.
Depending on how long the chapters are, you give us the first chapter. If the chapters are long, you can just give us the first couple of pages that give introductory information.
