Okay, first, I have to admit that I have a special place in my heart for Sun City. It was where I got my start in photography as a high school kid, photographing the same kind of people and events that Granser did (only I did it for peanuts for the local paper). That said, as someone who's been there with a camera, Granser does an excellent job at capturing the fundamental weirdness and unintentional humor that lurks in a place where lawn bowling is the happening to thing to do, and people think nothing of driving their golf carts to the grocery store. His photos are straightforward yet subtle, the kind of images that invite you to explore every corner.
To be sure, there are a few (in my opinion) weak points to his portfolio of images. Granser falls into the trap of making some cliche "Americana" photos of the type that European photographers love to make: there's a lead-off shot of a guy dressed like Uncle Sam in front of a flag, of course, and he also made sure to find some codgers target-shooting in the desert so he could get the obligatory photo of someone clutching a firearm. He also seemed a bit too fascinated by shots of gravel lawns adorned with cacti, but then again as someone who grew up in the desert I'm used to seeing those.
All in all, though, the flaws of his work are minor in comparison to the set of images as a whole. I've been wanting to see the whole thing ever since a few were printed in the 2002 World Press Photo annual (where Granser won an award for them), and I'm glad to see them being given the book treatment.