Suggest me some history, facts or non fiction based graphic novels

Hi,

I am looking for some suggestions on choosing the graphic novels which are not too difficult to follow. I tried reading Palestine by Joe sacco, but it had a lot dialogues in one scene that it made difficult for me to understand whose dialogue comes first and in what order, bit cluttered if you ask me. I need some graphic novels suggestions on history, facts or anything interesting non- fiction really which is easy to follow too.

I have read almost all graphic novels on anne frank and her life in the attic.