And the winners are...
#1: 
sam_decker
Win Trey Ratcliff's "A World in HDR" through @petapixel - http://j.mp/ppawihdr
#2: 
jdenham
Would love to have this book! Trey is the man! http://j.mp/ppawihdr
#3: 
gregoriusness
I just entered a competition to win HDR book by the fantastic Trey Ratcliff... http://j.mp/ppawihdr
Number of entries:
“A World in HDR” by Trey Ratcliff
We're giving away "A World in HDR" by Trey Ratcliff. Simply post a tweet through the following form containing the link, and you'll be entered in the giveaway.
The giveaway is posted on PetaPixel here. Good luck everyone!