The most recent book I know is Squamish Select(2012 edition) by Marc Bourdon. Kevin McLane book is out of print, but you can sometimes get it for $70 used.
I was just up there last weekend(7/21/17), rainy. We went for Skywalker on Sunday at 8 am and there were 4 parties ahead of us already, we had a 2 hour wait to climb it. But it would have been too much effort to drive and climb another route.