Why did you choose that one? I used the "Chapters" because they were in the public domain, but not yet listed on Project Gutenberg (gutenberg.org). I scanned the chapters from their original source, The North American Review, sent the files to Project Gutenberg for authentication and then recorded the material for Librivox.org. This was a learning experience which has resulted in a relationship with Project Gutenberg in which I send them list of all the "typos" I find while reading their files of Mark Twain's works. They then make the written corrections.