Rolando Rodriguez
It's a great commentary, not very exhaustive, as C.T. Russell, who died in October 1916 didn't have thoughts on every Biblical verse. That said it helps Bible students to understand what he believed was the Truth of God's Word, and what the early Watch Tower movement taught before Judge Rutherford took control, discarded most of Russell's teachings and created the Jehovah's Witnesses in 1931. Highly recommended, it's well referenced using all of Russell's writings between 1879-1916