It's possible you might be thinking of:
* Frederick Law Olmsted: A renowned landscape architect who designed Central Park in New York City and many other famous parks. He was also a writer who published books like "Walks and Talks of an American Farmer in England" and "A Journey Through Texas."
* John Olmsted: An architect who worked with his father, Frederick Law Olmsted, on several projects.
Could you please double-check the name or provide any more context about the author you're looking for?