CoS SPOILER Dark Gift The Kingmaker and Tome of leadership and influence stack?

[NeverLucky]

You're sure about that? Based on my AL library, there are two AL mods where one might collect a Tome of Understanding (+Wis), but none where one could collect a Tome of Leadership and Influence (+Cha). Since the whole point of this thread is stacking the Tome with a Dark Gift that also grants a Charisma bonus, that's a pretty significant difference.

It's in a CCC module that has been ran, but has not been published yet.