I am looking to reread a SF book but can't find it. Story centered around society with endemic use of virtual reality glasses for the poor and VR implants for the rich. Rich people could access multiple layers of VR. People wandering around the streets murmuring to unseen VR enities. A female blogger is blown up in a zeppelin train terrorist attack and becomes disembodied brain leading crowd of cyber vigilanties. Sound familiar to anyone? Searched online but couldn't find it. Your help is appreciated.