If this is how you've presented the question, Its a bit hard to answer it when one hasn't read these books. It'd be best if you'd put both books into a summary for us to go based off of, at most.
Answer:
because sometimes they tell us things that we didn't know things that are in the past but just when the stories are real.
Pretty much just the main idea
Answer:
the letter will be wrote by them
Income inequality of the U.S. has reached the highest peak since the Great Depression. Americans who make 40 times of much are in the top 1% than the bottom 90%. The population in 1978 had 0.1% claim to nearly 7% of the wealth and a 22% increase by 2012. Other nation's income inequality has had an armful of harmful outcomes, debt was also one of the higher rates, crime, and mental illness. Researchers want to understand this better by investigating how his inequality might have an influence of those of know of it.
I don't know how well it is. Kinda hard to summarize this. Hope I at least helped a bit.
