I was just watching one of Dr. J podcast and he makes reference to the Comprehensive Bible Cross References. I see that it has cross references to extra biblical material. I am assuming that in order to be able to make the most of this references I should have access to that extra Biblical material. Am I correct?
Then, here are my questions.
With the Essential Collection, is it good idea to purchase the Comprehensive Bible Cross References?
What additional materials will make it most useful?