With books values are determined by the fame of the Author, the edition of it and it's rarity. This one was originally published a pamphlet, which at some point has been bound into a book. It was written by Robert Buchanan (1841-1901) and he touched off one of the most celebrated literary controversies of the nineteenth century with this one. Buchanan printed this originally under a pseudonym, "Thomas Maitland" in the Contemporary Review in October 1871. His authorship was quickly known. He expanded the essay and re-published it as a pamphlet in 1872 under the title "The Fleshly School of Poetry and Other Phenomena of the Day". In my opinion this one would be considered a bit rare, it would list with Antiquarian booksellers in the $850.00+ range.