The full tiltle is Personal Recollections of Joan of Arc. From Wikipedia:

"Twain had a personal fascination with Joan, and initially penned this novel under a pseudonym. It has a very different feel and flow than Twain's other works. There is a distinct lack of humor so prevalent in his other works. This is a mature Twain writing something of personal interest."

I've added a cover and a few illustrations. The chapter titles are from the Project Gutenberg edition.