"Z-Day on Centauri" by Henry Simmons is an exciting science fiction book about the future of a human colony on the planet Centauri. Everything seems perfect until the mysterious "Z-day" comes - a day when the behavior of the personnel at the base changes dramatically. The main character, engineer Max Williams, decides to find out the reason for these strange events and save the colony from destruction. But the closer he got to the "Z-day" mystery, the more he realized that the threat might be much greater than he imagined. Intricate mysteries, unexpected plot twists and incredible atmosphere make this book exciting for any fan of science fiction.