I personally find myself comparing the KJV with the original Greek as well as the pre-Challoner version of the Douay-Rheims when I want more insight into certain passages.
Commentaries also provide interesting insights. They typically cite the translations that were used as well so you can see how their conclusions were drawn
https://www.youtube.com/watch?v=zD_r3_aCvsw
Another book similar to Riplinger's is "Corruptions in the New King James Bible" by Jack Mundey. The writing style is a little enthusiastic, but the author compares several editions of various bibles, showing where and how they changed over time. Both Mundey and Riplinger draw the conclusion that the NKJV and NIV are deliberately changed to mislead people, and therefore are Satanic, though neither one makes any point about the KJV's edits themselves, such as the name of God or translations of "Hell" as I've mentioned earlier.