You and your best friends are traveling around the world in a giant balloon. As you cross the Sahara Desert with its endless, golden sands, you spot a large silver dome in the distance. It looks like a flying saucer, but you can't be sure. Should you cut your journey short and investigate the mysterious object?

The book is delightfully illustrated in cartoonish style by Paul Granger (real name: Don Hedin); the cover art, by Romas Kukalis, is copyright 1989, so that is probably the approximate date of this reprint edition.