== external link to Sitting Pretty book review == 

 as a newbie, the link to the book review seems odd - uninformative advertising. 

  

 == related links? == 

 Why does this article link to lodging? Its not related at all as far as I can tell. 

 :The bit about sleeping sitting etc. is related.  

 The picture is not erect posture.  It is an exaggerated arch for dramatic effect  Cayte