Hey...
This year i did software engineering which has same first year as Electrical Engineering. Note book editions might change between years, this wont really effect you although sometimes lectures will put up a note saying this lecture covers pages 20-25 say. But if you look through the book u can find the info pretty easily neway.
Also dont hold me responsible if they change the text book this year (might happen)
Books for math subjects: None, the uni publishes little course work books which are like 10 bucks each, aparently there is a calculas book that is recommended for people who didnt do 3u math or ppl who want to go into greater depth in a subject
For stats you need to get a textbook, but this is published by the lecturer so they may change it or somethign.
Books for Elec1101, and elec1102. For elec 1101 you need
Tocci and Widmer, Digital Systems - Principles and Applications, 8th Edition, Prentice Hall
for Elec1102. Dorf and Svobode, Introduction to Electric Circuits, 4th Edition, Wiley
I like digital systems, its a pretty good book. Introduction to electric circuits can be confusing though..
Physics(both of them)- You need Young & Freedman. University Physics. 10th edition- Getting the right edition for physics is probably a good idea, cos the lecturers put up lists of practice questions and recomended chapters to read. Also you have fortnightly "homework assignments" consisting of like 4 questions of which 2 are marked, and the questions are often specific textbook questions.
Software- The recommended textbook is big java. In reality you can buy any book on java 1.1 or above. Big Java is a good introduction to programming though, since its standardised id go for that if you feel the need for a book on java. You could also just download thinking in java by bruce eckel for free... but since software exams are open book, its nice to have a good api reference in dead tree form.
I think thats it, personally i waited until second week of uni to buy all my text books cos then you find out exactly what you need. But you can probably get em cheaper if you buy them now second hand.. check out the second hand bookshop (in the cubby house in wentworth)... im not sure if its open during the holidays but thats definately the place to go.
Ah yeah, more information can be grabbed here..
http://www.ee.usyd.edu.au/ugrad/Degree_Info/ee_res.phtml