Robert Rayburn has informed me that his book, a revised version of his dissertation, has now been published:
Rayburn, Robert. “Yesterday, Today, and Forever”: The Narrative World of Ψ 94 (Ps 95) as a Hermeneutical Key to Hebrews. Berlin: Peter Lang, 2019.
Abstract from the website:
"Hebrews is a book of riddles. Recent scholarship has arrived at an
impasse over difficulties and apparent contradictions within the
argument. A new look at Hebrews is needed. This book examines the use of
Psalm 95 in Hebrews. The psalm recalls a narrative world and renews an
exhortation that reoccurs throughout Israel’s history. Hebrews takes up
this summons and the story behind it (Heb 3-4, 10-12) to urge its
audience to be faithful. This exhortation unites God’s people past and
present (Heb 1, 13). The results of this study are applied to the new
covenant (Heb 8) and reveal that a reexamination of common assumptions
about Hebrews are necessary. A review of the history of interpretation
shows that while assumptions about Hebrews have an early beginning, they
have not gone unchallenged."