How to theme content edit page I themed page to create custom type node and named it page--node--add--book.tpl.php
It works well, but when I tried to theme content edit page and named it page--node--edit--book.tpl.php
nothing happening. Help to fix this.

Tried suggestions:

function bookhive_theme() {
  return array(
    'book_node_form' =&gt; array(
        'arguments' =&gt; array('form' =&gt; NULL),
        'template' =&gt; 'book-node-form',
        'render element' =&gt; 'form',
    ),
  );
}


and 
suggestion from here 

http://www.wdtutorials.com/how-to-override-forms-using-custom-template-drupal-tutorial/7
Ok, I find an answer. In my case the proper theme suggestion was html--node--edit.tpl.php I used theme debug mode to find it. 

Also, to make page--node--edit.tpl.php works I need to delete my page--contenttype.tpl.php file. To customize my content type page I just used simple check in page.tpl.php if($node-&gt;type == 'book'):

&lt;!-- THEME DEBUG --&gt;
&lt;!-- CALL: theme('html') --&gt;
&lt;!-- FILE NAME SUGGESTIONS:
   * html--node--edit.tpl.php
   * html--node--209.tpl.php
   * html--node--%.tpl.php
   * html--node.tpl.php
   x html.tpl.php
--&gt;