In my opinion ‘interaction design’ is a way of thinking, a philosophy if you want. It is different from ‘industrial design’ because it takes ‘values’ and ‘goals’ of users as a starting point. You could do a lot of reading, especially about some of the methods used to dig in the users life / context. You might want to have a look here as well;
putting people first
interaction design blog
like it matters
Goodluck with reading and feel free to ask questions!