Nietzsche's most influential book which is telling a story of a Persian prophet Zarathustra trying to tell the world that God is dead. He constantly talks about the Superman, the human embodiment of divinity. If you are obsessed with thinking about your place on this planet and trying to find the meaning of existence, go on.. You will start reading the first page and think about what you've just read. I wanted to underline every single sentence of the book 'cause each sentence has a deep meaning. After reading the last page of the book, you will remember nothing and everything about it. As a matter of fact, it is a book for everyone and no one :)
