How about going to the moon?Marcus and Samantha Willoughby figure it'll be a quick trip...kick a little moon dust, leave a discreet footprint or two, then return home before they're missed.After all, it's not like there's anything or anybody to encounter on Earth's satellite. Is there?Follow the twins as they uncover a well-kept secret. One which could cause a crisis of unimaginable proportions.Can they help provide a quick and effective solution? Because failure simply isn't an option.