A lot of the content from How to be a Games User Researcher is available free on this website.
If you are a serious about becoming a Games User Researcher, and unable to afford the full book, I would like to offer you a free copy of the remaining sections. I believe a lack of funds shouldn’t be a barrier to becoming a games user researcher (it’s hard enough already!).
Email me at ux(at)stevebromley.com with the subject ‘Free Games User Research Book’, and I will be in touch with details.