Use your research skills to find other resources. You can order the text books from the UNSW Bookshop. If they do not have stock, be sure to ask at the counter as they will add your name to the list. You can also find Norman in most large bookstores. Copies of the required texts Norman and Nielsen are in Open Reserve in the library.
Strawman format refers to a rough sketch of the interface that is easily replaced and refined.
The idea is not to place too much effort to make the interface look like a real interface - especially in the early stages of design. You need to detail the primary functionality of the user interface. Recall from Susan's lecture that a strawman is the same as a scarecrow. Strawman format looks like a user interface but isn't a real interface - it is a reasonable representation of one. You need to consider the set of tasks that you would like your user to do during the evaluation of your paper-based mock ups.