I picked this book up for fun one day at my bookstore job. It looked interesting & throughout my life, this was one of Vonnegut's books that everyone's crowed about. I just wish I'd liked it as much as they did. 
 Since there's dozens upon dozens of reviews on here that give the plot synopsis, I won't bother rehashing it here & just give you my opinions. 
 I liked the book for the most part. It just didn't grab me. The idea of the book is fantastic & I can see where it is very well written. Parts of the book did interest me- especially the idea of predestination. Billy accepts that things won't change, so he doesn't really try to change anything. (Well, assuming that he traveled through time at all. It is debatable to some people whether any of the book was real or just a delusion.) 
 If you have to read this for class, don't worry. The book is enjoyable enough. Hopefully you'll even like it more than I did. I liked it enough to finish it & recommend it to my sister (who loved it), but not enough to really re-read it like I do some of my other books. If you don't have to read it for class, I still recommend it. It's an interesting enough book. Just check it out from the library first.