I am writing a book proposal for an academic press, (which I hope to complete by end of June), on Immersive Humanities (theories techniques and issues in Virtual Reality Virtual Worlds and Game Design that can or will apply to Digital Humanities research and teaching, and vice versa).
A very schematic structure so far is:

1. Introduction
2. Definitions of Immersion, Immersivity and Presence
3. Historical Survey of Immersive Humanities Projects and Case Studies
4. Tools Techniques Platforms and Theories of Immersive Environments
5. Methodologies and Evaluation
6. Conclusion

The four main chapters should be 8,000-10,000 words each.
Any major related themes I have missed? Other ideas?
What is the best target audience to aim for, final year undergraduates, postgraduates, or colleagues?

Some key references I will need to consider, contrast with:

• http://www.amazon.com/Building-Imaginary-Worlds-History-Subcreation/dp/0415631203
• http://www.amazon.com/Virtual-Embodied-Practice-Presence-Technology/dp/041516026X
• http://www.amazon.com/Narrative-Virtual-Reality-Interactivity-Literature/dp/0801877539/
• http://www.amazon.com/The-Art-Immersion-Generation-Hollywood/dp/0393341259/
• http://www.amazon.com/Configuring-History-Teaching-Renaissance-Cityscapes/dp/0820467847/
• http://www.amazon.com/Virtual-Decisions-Simulations-Reasoning-Humanities/dp/0805849955/
• http://www.amazon.com/Creating-Sense-Presence-Online-Teaching/dp/0470564903/
• http://www.amazon.com/Learning-Online-Simulations-Virtual-Worlds/dp/0470438347/