Edizioni Bietti has produced a new Italian edition of Lovecraft’s own writings on Teoria dell’orrore [The Theory of Horror], in 580 pages…
“it is not a mere reprint, but a new edition — updated in the introduction, in the notes and in the numerous bibliographies that accompany it. The aim of the book is to offer Italian readers a theoretical framework as complete as possible”.

Given the size of the book, I’m guessing it also includes relevant extracts from the letters, thematically arranged?