Fourth ed. of Light, Science & Magic an update?

<p>I noticed that the fourth edition of Light: Science and Magic has just been published. I have the third edition, published in 2007. For anyone that has looked at both, is there any major improvements or updates in the new edition?</p>

<p>From the publisher's blurb about the new edition:<br /><br /><em>"With more information specific for digital photographers, a brand new chapter on equipment, much more information on location lighting, and more on photographing people, this brand new fourth edition will make it clear why this is one of the only recommended books by Strobist.com."</em></p>