If I want to use the Ancient Literature guide to locate cross references in the Nag Hammadi and already own THE NAG HAMMADI LIBRARY IN ENGLISH by James M. Robinson, General Editor, Fourth revised edition, is there any advantage to also purchase: Nag Hammadi Texts and the Bible: A Synopsis and Index | Logos Bible Software ? Would it essentially be duplication? Any advantage to having both?
The one I own seems comprehensive for cross referencing purposes, but I wanted to check here first as it’s worth asking for $80.
tia
Blessed Mother's Day!