There are tons of knowledgeable teachers out there, and they are very often motivated to help the next generations thrive and grow beyond their day job. I'm sure you could find people to help with editorial work on this version to give it a human stamp of approval, and involve the many talented and inspiring educators and communicators that are out there to help grow this into a true value for the next generation.
Either way. Good luck!
Separately, I wonder whether you'd find something like this more trustworthy: https://kidsdiscover.com/shop/issues/roman-empire-for-kids/
And, if so, what signals do you think makes it more trustworthy in your eyes?
Great question. Thankfully most of the topics I'm covering here are well covered by trusted sources that are freely available on the internet. This is particularly true about dates (e.g. when a particular philosopher died). Separately, many of the articles are less about the specific history of each topic, but about how the topics fit together and what you as a reader might like to think about as a result. These parts aren't stating facts (which can be true or untrue) but explaining that there's a different way to look at something (which is matter of opinion or perspective).