I am looking for a book do not know the author or title.
This one may be a little too vague to pinpoint, since there are many books, especially fiction, that feature the elements you describe. I've shared it with my colleagues, and will let you know if we come up with some possibilities. You could also try the book puzzler sites I mentioned in response to your other query. Or let us know if you think of any more details that might help identify the book--such as names of protagonists, setting, etc.
I have had what sounds like a good guess! What about:
No More Words, by Reeve Lindbergh, published 2002? http://omaha.bibliocommons.com/item/show/1208650060_no_more_words