Who was the editor who worked with author to polish novel that won Pulitzer Prize For Fiction in 1961?

The novel that won the Pulitzer Prize for Fiction in 1961 was "To Kill a Mockingbird" by Harper Lee.

The editor who worked closely with Harper Lee to polish the novel was J.B. Lippincott. He was the editor at J.B. Lippincott & Co., the publishing house that brought the book to the public.

While Lippincott played a significant role in shaping the final manuscript, it's important to note that Harper Lee was fiercely independent and maintained strong creative control over her work.