The Twilight Saga: The Official Illustrated Guide will be released April 12th, 2011 in the USA. Written par the Twilight Saga's own auteur Stephenie Meyer.
Summit confirms the leaked 'Breaking Dawn' photos are legit and are removing them from any sites/blogs. I don't know how thurough they'll be, but if toi want them, toi better save them to your hard drive before they're all gone.