Richard Wilson 
And Then the Town Took Off [EPUB ebook] 

"Behold, " he said. "Something Columbus couldn’t find. The edge of the world." For its time, published in 1960, innovative science fiction. The town of Superior Ohio one day simply lifts up off the earth and rises to about 10, 000 feet and then higher. The book follows a couple residents of the odd town, whose major industries are a bubble gum factory and an odd "school." (Goodreads)