What do you want to read in a book on Unity and Architectural Visualization?

I am currently in the writing stage of a "mini" book on Unity for Architectural Visualization. There is not much   I can publicly share, at the moment, but I do hope it will be worth it.

So if anybody has some ideas of what should absolutely be included in such a book, let me know and I'll see if I can fit it in somehow. But good, practical tips are also very welcome.