Otherland - Tad Williams
Ready Player One
Daemon - David Suarez
Neuromancer - William Gibson
Shadowrun - ?? there are lots of possibly varying quality, I only read the ones by Nigel Findley which I liked
Snowcrash - Stephenson
Reamde - Stephenson
Der falsche Spiegel - Sergej Lukianenko (not sure about the english name)
Masters of Doom - Story of ID developing the games Doom and Quake - not really a VR story, but it sets the mood.
Pollen - Jeff Noon
Bruce Sterling is great, too, but I don't remember which of his stories are about virtual reality.
I suppose Ian Bank's "The Culture" novels might be a candidate, but I haven't read them yet.