Here is why I do not believe that McMillan is being honest with us.
Take the eBook
Ender in Exile. It's $9.99. The book is also available as a mass market paperback.
http://www.amazon.com/Ender-in-Exile...5497565&sr=1-1
So why is the eBook $9.99 if prices are supposed to be $5.99?