Mike Kibbe informed me that there is a new book out on Hebrews:
Hermann V. A. Kuma. The Centrality of Αιμα (Blood) in the Theology of the Epistle to the Hebrews: An Exegetical and Philological Study. Edwin Mellen Press. 2012.
Description: "This book demonstrates that because blood sanctifies, consecrates and purifies, the Greek word for blood provided the best expression for the unique role of Christ as self-sacrificing High Priest in the Epistle to the Hebrews."
Click on the title above to access the Edwin Mellen site for contents of the book and for other pertinent information.