I was pleased to get the following book in the mail:
Paolo Garuti. Alle origini dell'omiletica cristiana: La lettera agli Ebrei. Jerusalem: Franciscan Printing Press, 1995.
I have been looking for this book for some time and managed to find a used copy in excellent condition for a fairly decent price. It engages in one of the most detailed treatments of the rhetoric of Hebrews. However, I don't agree with his conclusion that there are redactional layers in Hebrews.