Trying to identify an ethos, catch a trend in Art (beyond some, often peripheral, elements) is like trying to figure out what everybody's like now. The diversity is overwhelming, inspiring, depressing. And it's now virtually impossible to appreciate art/artists through one of these books (the way you can get some idea, if aura-less, of the work of Van Gogh, Monet, Kandinsky, et al. by looking at reproduced images). Most contemporary work is five-senses with the visual having become almost negligible and so trying to get a read on immersive installations, socio-political events, interactivity, technology, et al. can only be done on site.