Here's the thing: Bruce Mau is a very good designer. His office turns out a lot of very refined objects, this monograph included. That said, this book is probably twice as big as it ought to be. It seems to me as though BMD wants to be more like OMA; "S,M,L,XL" was one of the best architectural books ever, and its heft reinforced the work being shown within it. "Life Style" is just big for the sake of being big. Well, as well as being self-indulgent. Because graphic designers are not asked to be deep thinkers, and most of their attempts at same do not fare very well. Bruce Mau really wants to be considered as an equal to the deep thinkers, and he just isn't. He's just a (very) good designer.
Buy it anyway. It's got too much good work inside to ignore, but keep some salt handy.
(p.s. indigo.ca was allowing people to choose their cover; they may still be doing that)