|The Mysterious Stranger|
by Mark Twain
Of course I'm not going to actually tell you WHO the mysterious stranger is. That would just ruin it and you wouldn't need to read it for yourself. Though I did spend most of the book wondering if he was who he claimed to be, or if he was actually his namesake.
Mark Twain can be very hard to read, but this was not the case. Set in Austria around the times of witch burnings, this book sets itself apart from most of Twain's works. There is no phonetical dialogue that he oft uses, and I personally find very hard to read.