[Would it be possible to know why the question has been downvoted? So that I can improve future ones]
The question comes from the fact that I found I have at home Aztecs of Mexico by George Vaillant. The book was published in the 40's but it went through further edition(s?), which I understand is from the 60's, which included the latest studies and discoveries of the time.
If I read this book today, would I be missing a much richer / more precise / more correct / etc picture that I could get with a more recent work (still talking of books for the general public)? Or has our knowledge of the Aztecs remained more or less similar - at least to a level that makes it worth for me to stick to this particular book which I already have?
I also have The rise and fall of Maya civilisation by Eric Thompson, which makes me ask the very same question but for the Maya - however I don't know if it's ok to include that here too, or if I should create a separate thread.