do you have book suggestions for world history? my son thoroughly enjoys the "my dear america" series (mostly the ones with boy main characters). i'm hoping to find a realistic fiction series with a similar approach (main character is journaling as they personally live through an historic event in american history, so it reads more like an intense, really good story - instead of a more typical, dry history text). however, i want to find one that goes past u.s. borders.
ideas are greatly appreciated

btw, he just turned 6, so i need ones without too much gore.