This number just called me also, it came through on the caller ID as Brenda Reuter whom I do not know so I did not answer, but upon checking this page out I see that someone said it is iuniverse a publishing company so I can honestly assume that this is who the Brenda Reuter is calling from or for because I just recently filled out a form to receive their tips on publishing.
Call comes from an outbound phone bank representing a private book publisher. Message (real human) refers you to a different number. If you aren't working on a book, I wouldn't worry about this to much. If you are, consult an attorney before you commit to a publisher. If you don't, you'll wish you had.
The caller is iUniverse, a self-publishing company in Bloomington Indiana. Odds are you either asked for info on their website, or someone gave your number to them to not include their own. They are legitimate.