Nah, excel is a study guide more than anything else, not a text book. Good for study though at the end of term and revision etc etc.
The one my class is using is:
PD/H/PE- application and Inquiry (HSC course) by Stan Browne, Karen Lambert, Deb Clarke, Vicki Jeffreys
Published by Oxford.
It's been written to follow the syllabus, with all the Cores and Option modules
It's a good text book (very thick!!) which goes into detail, but not so much that your head spins after reading a paragraph! Although my teacher supplements it with others. For example in Core 1 the whole thing about medicare and the PBS that they go on about is really confusing, and she got us some sheets that explained it better, and even summarised it better for us.
You can buy the book, everyone in our class did so we could keep up to date with hw and things. Stops us faling behind cos we can do summaries and readings at home for hw. I'm not sure who we got the books from but if you wanna know i can find out 4 ya. They set us back $42 each in a bulk order, so they could be more expensive than that.
But u really need a text book, excel wont do it 4 ya!!!