Download it today! Tell your friends! Tell your friends' friends! Tell the people who aren't really such good friends of yours after all but you wouldn't turn down having a beer with them, if they were buying! Tell everyone!
And may you and yours have a Happy Christmas!
P.S. If you don't have a Kindle, you can always download the free Kindle Reading App for PC, Mac, iPhone, iPad, Blackberry, Android, etc., etc., etc...