The exhibition is on 'till 12th Feb. I'm probably going to go again while I have the chance.
The book is worth every cent, $49 IIRC. Interestingly the prints in the book are 'better' in many respects than the actual images on display. The images in the book are some times larger, sharper and certainly 'brighter' (as the illumination in the Gallery leaves some thing to be desired) but the real images can't have their glow/brilliance reproduced.