Better Things explores in detail every verse of Hebrews, developing the Oneness Christology of the book and demonstrating conclusively that the Old Covenant was replaced by the New Covenant on the basis of the Cross of Christ.
This book does a fair enough job of exegeting Hebrews from the framework of the UPCI. but his overall theological system is misguided. Back when I had the same denominational affiliation as Segraves, I read everything he wrote I could get my hands on (outside of his Urshan biography). I no longer hold to his denominational distinctives, but I'm thankful for the formation he did provide.