How to contact author?

answers1:Many popular authors have websites. Many of them have message
boards on them where you can leave a comment. Some have contact
information. If that fails, you can always go through their publisher.
Book publishers also have websites with their authors listed. They
could forward a message or you could write the the author C/O (care
of) the publisher.
answers2:If the author doesn't have a website, or at least, doesn't
have a website that includes any means of contacting them, then you
should look inside the book to find out the company that published it
and write to the author at their address.
answers3:The publishers address is in the book. You can send a letter
to the author care of the publisher.