I love Mark Twain, but have not yet read the 2 you are talking about (you only gave the title for 1?). Mostly his short stories and of course Huck Fin, Roughing It and Life on the Mississippi. I just got his autobiography, which came out 2 years ago, I think. He left strict instructions for it to be published only 100 years after his death, so it was just published. Can't wait to sit and read it! I will have to check out the Diaries and get back to you.