"'Your planet is known as the laughing planet. Did you know that? Yours is the only planet in the whole universe where there's laughing.' So says BB9, whose main ambition in life is to make people laugh. Which is why he chooses to contact Kate to help him with his mission. From her self-portrait drawn on her father's computer, it looks as if she has a sense of fun and would definitely enjoy a good laugh. But who is BB9? Is he really a creature from outer space, or is this all a big hoax? The Computer Nut has a job on her hands to find out just exactly what's going on!" -- Back cover.