ACTUALLY,
I found his books exceedingly Biblical and kosher in terms of Scripture, logic, history, analysis etc.
Rev. Riddelbarger or Mr. Rosenberg?
Actually, Rev.20:8-9 is referring to the post-Millennial age, after Satan is released and sparks a world-wide revolt against Christ.
After this final revolt is put down, then the Great White Throne judgement occurs and then the eternal state, with the New Heavens and Earth. (Rev.21-22).
It would seem that there are two references to Gog and Magog in the Bible.