I sent out this short list of reading material which goes into more detail about what I often talk to people about. My knowledge of interviewing is not so much on the science but how to present yourself (acting) to others so that you can get answers to your research question(s). These books cover just about all you need t know. My favourite is Mental Models by Indi Young – it’s concise and easy to understand. Indi Young and Erika Hall are just about my favourite people working in design right now. Erika Hall is one of the few reasons why I still use twitter.