Difficult, difficult. I rather like Edith Wharton, so I choose her book.
I passed on on Mark Twain, though I read his Huckleberry Finn and all from an early age on, but I really am not so in autobiographies, to tell the truth.
Being from a medical background before my cultural profession, I am rather intrigued by Countrydoctor by Sarah Orne Jewett, and as for Henry James: who can resist a good love story?