Samuel Clemens lived 75 years, 50 under the pseudonym Mark Twain. His youth could be characterized as sometimes mischievous, his older years as generally eccentric and his writing as always provocative. Twain left a literary canon of nearly 50 books, hundreds of short stories and essays, and a veritable treasury of quotable epigrams. While his words and his works have stood up to the test of time, knowing the man behind the persona, and understanding...