 that they are looking to change the behavior after a visit to run to a glacier I mean and tourism you know we can debate whether last-chance tourism is is a good or bad thing I mean the fact is it's happening in tourism is expected to grow and significantly in the years ahead so I think the most important thing to do is focus on how we can do this in this constructive way possible and people do you want to read more about last-chance tourism I know that you've written about it extensively for the New York Times Conn Ross I'll turn to you tell us about your new book