Is the bookstore Fenno opens in New York City a successful venture in the novel, Three Junes?

Plume is the bird-themed bookstore that Fenno opens up with seed money from Ralph Quayle. The bookstore features fiction and nonfiction books, and covers a broad extent of subjects, topics, and genres. The bookstore is very popular early on, but business begins to die off after a year and-a-half.