Final answer:
Johann Wyss's father's book, which Johann edited and completed, is about the 'Swiss Family Robinson', a story of a shipwrecked family's survival on a deserted island. It's a celebration of ingenuity and the pioneering spirit.
Step-by-step explanation:
Johann Wyss edited and completed his father's book, which is about the Swiss Family Robinson. The book tells the story of a Swiss family who become shipwrecked on their way to Australia. The family members, consisting of a mother, father, and their four sons, work together to survive on a deserted island. This novel has become a classic of young adult literature, celebrating ingenuity, hard work, and the pioneering spirit.