Reddit mentions of Virtual Space: Spatiality in Virtual Inhabited 3D Worlds

(These are all (non-fiction) books. If you want research papers I can give you a bibliography of things you might find a few interesting things within.)

Virtual Reality by Howard Rheingold is a very good place to start for a founding in the history of VR (right back to the invention of the HMD by Ivan Sutherland in the 1960's) but was written before the current reignited interest in VR that Oculus has triggered;

http://www.amazon.co.uk/Virtual-Reality-Revolutionary-Computer-Generated-Worlds--And/dp/0671778978/ref=sr_1_1?ie=UTF8&qid=1396019470&sr=8-1&keywords=virtual+reality+howard

If you like Rheingold's writing style then The Virtual Community might be of interest to you. Not directly related to VR, but as VR becomes more mainstream (& especially with players such as Facebook expressing interest) it is only a matter of time until VR becomes a popular interface to virtual communities;

http://www.amazon.co.uk/gp/product/0262681218/ref=oh_details_o08_s00_i00?ie=UTF8&psc=1

If such sociological aspects of computers/VR interest you, then Sherry Turkle's books are fascinating;

http://www.amazon.co.uk/gp/product/0262701111/ref=oh_details_o09_s00_i00?ie=UTF8&psc=1
http://www.amazon.co.uk/gp/product/0684833484/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1
http://www.amazon.co.uk/gp/product/0262012707/ref=oh_details_o08_s00_i00?ie=UTF8&psc=1

As somebody else already mentioned, Infinite Reality is a nice read, but is very 'light' on science/technical detail;

http://www.amazon.co.uk/gp/product/0061809500/ref=oh_details_o05_s00_i00?ie=UTF8&psc=1

If you like your cyberpunk fiction then Cyberspace: First Steps is great - it even has a foreword written by William Gibson;

http://www.amazon.co.uk/gp/product/0262521776/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1

For more of a brain-fuck read, take a look at The Cyborg Experiments;

http://www.amazon.co.uk/gp/product/082645903X/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1

For basic virtual environment/virtual world background I can recommend these two (Richard Bartle is the guy who invented MUD1);

http://www.amazon.co.uk/gp/product/0131018167/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1
http://www.amazon.co.uk/gp/product/0631182144/ref=oh_details_o07_s00_i00?ie=UTF8&psc=1

And if by 'the VR experience' you mean 'immersion' or 'the sense of presence' then the first section of Virtual Space is a good start before diving into back issues of MIT Presence;

http://www.amazon.co.uk/Virtual-Space-Spatiality-Inhabited-Worlds/dp/1447111001/ref=sr_1_1?ie=UTF8&qid=1396019722&sr=8-1&keywords=virtual+space+spatiality