Brilliant series. Don't assume you need to have read the books - the first episode will set the stage. After that it is a wild ride, with great visuals and moral dilemmas.
Amazing to see is the 'comic book' visual/graphics being brought to life. But at the heart of it is the very human stories about vengeance, ego that temper into acceptance and forgiveness.
Episode 5 and 6 are particular highlights.