title: Changing the size of an ePub book
body: <p>Does anyone know how I set the width and height for an epub book?</p>
  
  <p>I've noticed that there are books with different sizes and I am trying to work out how they do this.</p>
  
  <p>I've been reading <a href="http://www.idpf.org/epub/30/spec/" rel="nofollow">the spec</a> but as yet I can't work it out?</p>
  
  <p>Is it just done in CSS or is there part of the spec I need to use?</p>