"Unlucky Day for Sales" is an exciting science fiction novel by the famous American writer Fritz Leiber. The book tells the story of a fraudulent family that encounters interplanetary inspectors while solving speculative cases on a distant planet. Tense atmosphere, unpredictable plot twists and interesting characters make this book exciting for fans of science fiction. "Unlucky day for sales" is an exciting work that will take you into an incredible world of intrigue and adventure.