Reading material for a non-Jewish friend

I have a friend who is not Jewish and is deeply skeptical of the concept of Jews as “one nation” and the connection they feel to the land of Israel. I have found that I am not able to satisfactorily put my lived experience into words for him to understand. Do any of you know of any reading material that he might benefit from? He has no real knowledge of Jewish traditions and terminology, and probably doesn’t have the patience to sit through hundreds of pages of Kook. Thanks!