Ahoy there mateys! This was a gift book I picked up in a used bookstore because of the premise and the unicorn on the cover.  The Change happens and magic enters Earth.  I read it before I gifted it.  The first half was silly but fun and I was going just roll with it.  Then it died.  It walks the plank for the horrible climax and ending.  The dude seriously was a jerk to the unicorn and I was disturbed.  The "romance" was horrible.  Apparently this is the first in a series.  No thanks to more.  P.S.  The author wrote this when he was 19.  Maybe that explains the bad ending?