My Mohr Siebeck catalog arrived in the mail today and it looks like a new book on Hebrews will be appearing soon (due in September):
Old Testament Quotations in Hebrews: Studies in Their Textual and Contextual Background.
Synopsis from the website:
"Georg A. Walser investigates the use of the Old Testament (Gen. 47:31b; Ps. 40:7b; Jer. 31:33) in the Letter to the Hebrews, taking the complicated textual history of the quotations into account, especially the Septuagint and the possibility that different Hebrew texts may underlie the Greek translation. Further, he draws on the assumption that Hebrews was composed in a Jewish context, where the Old Testament text had been interpreted for a long time. It is also presupposed that this exegesis was handed down in the post Second Temple Jewish community and in the early church. Hence primary sources, such as Talmud, Midrash and early church fathers, are consulted. The author shows that several versions of Old Testament texts were interpreted, which had a decisive impact on the exegesis and that some versions of the texts were favoured in the Jewish context while others were preferred in the early Church."