Ejen Chuang, who runs the all-encompassing photo resource blog for LA, Pix Feed LA, traveled all around the country to comic conventions shooting cosplayers. He even managed to make a 272-page hardcover book, which is a steal at $40.
His show's opening reception is Friday, Oct. 28 at the Icon Projects from 7-9 but there's an after party also, where there will be lots of cosplayers in attendance. Info on the night is here.
Project site is here.