Check out this link where the frumteens moderator explains the problem with the book:

http://frumteens.com/topic.php?whichpage=1&pagesize=15&forum_title=Other&topic_title=making+of+a+godol&forum_id=21&topic_id=2971

1. Title:
   Yoni S Yoni S, 

   Date: Jan 30 2014

   The above link is out of date. Here's an updated link:

   http://classic.frumteens.com/topic.php?whichpage=1&pagesize=15&forum_title=&topic_title=making+of+a+godol&forum_id=21&topic_id=2971

    

   Also check out this from R' Yaakov Shapiro:

   http://www.baismedrash.com/2012/02/loshon-horah-using-the-truth-to-lie-a-purim-lesson/