If you would like a clear, concise, quick read that will give you an accurate history of concealed carry laws and customs in the US, I highly recommend David Yamane’s new book.
To get a copy, make a donation to https://www.buymeacoffee.com/gunculture2pt0 .
If you sign up as a monthly or annual member, you get a free copy of the book. David puts out a lot of well researched information about Gun Culture 2.0, and I think you should support his work.