Two sisters. One ornithopter. The African Savannah. And one Army. Harriet (Harry) Edgbaston and her sister Khuwelsa enjoy their life flitting around the grasslands of East Africa in the ornithopter her father bought for her. But on a trip to see Lieutenant Schmidt of the German Army they become mixed up in what looks like becoming a major war. Escaping from captivity they msut try to warn their father in Zanzibar - but who will believe a couple of teenage girls? "IT WAS FUN. SO FUN. And when I got to the ending? I cheered. LOUD. Scared the cats."

1896 in a world where airships fill the skies. In East Africa, sisters Harriet and Khuwelsa Edgbaston set off in their steam-powered ornithopter on the trail of butchered hippopotamuses and their stolen teeth. They are lead across the Serengeti in an adventure that more dangerous than any they've encountered before.

Harry and Sellie are at home when the building comes crashing down around them. With their father kidnapped they are in a race against time to catch the man who has ruined their home and stolen away their father.