I have one of the older copies of this book, and it comes with this somewhat fairly epic Dedication:
"About the Time of the End, a body of men will be raised up who will turn their attention to the Prophecies, and insist upon their literal interpretation, in the midst of much clamor and opposition."- Sir Isaac Newton.
From the cover:
"....presumably pinpoints the exact time within the fourth kingdom when the Messiah shall appear. In the author's words, 'A proper understanding of the seventy weeks of Daniel not only safeguards the Christian against the elaborate guess-work of those who persist in setting dates for the Lord's return, but also furnishes the infallible key to the real chronology of all New Testament prophecy."
I read this as a youth after I'd first returned to the Lord and was influenced deeply. I recently found it on Amazon.com again and I still have to say that the Introduction and Part I are exceptional. In Part II and Part III I think he begins to fall off the rails, as he seems to be a Pre-Tribber of sorts.
Anyway it goes through all of the maths, setting the coming of the Messiah foretold in Daniel to our Lord's Triumphal Entry in Jerusalem, which was maybe controversial in Dr. Alva J.McClain's day, idk. It's really very neat. I have a link if anyone is interested: http://rediscoveringthebible.com/McClain.html
(approx. 10 pages)