A couple of factors to be considered.
1. How well do you recall your dreams in the first place.
2. Your dream state is used for solving pressing personal problems that you encountered during the days. Any books may be mixed into these dreams. Makes them interestesting but not a complete representation of the book.
3. Knowing that the dream state is a metaphor you will still need to activate the book to see if you can find the connection.
It's unrealistic to expect to have a clear dream about a novel but you certainly can get glimpes of it if you are accurate in recording and remembering your dreams.
Alex