Review about "Slaughter House 5"

The story was interesting to deal  about the time traveler, but it was also confusing that the story is not chronologically ordered.  It was interesting to travel between the imaginary world and real world by dealing with imaginary planet and World War II. For me, the book was actually boring in regarding to the new and curious usage of time travel.  However, Billy's ambiguous position and his unknown idea befuddle me to understand the whole story.   The sudden change of Billy's time travel made me to think the order of time and his mysterious stories is considerable that implies significant meaning.  It was abstruse but valuable enough to challenge the book.