Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Can used books bought off Amazon be claimed as a tax deduction in Australia?
Yes, you can.  That the books were purchased from abroad is irrelevant: you incurred an expense in the course of earning your income. If the books are expensive (>$300 per set iirc) you will need to deprecate them over a reasonable life time rather than claiming the entire amount up front. It doesn't matter whether what you got was a VAT Invoice; as long as you have some reasonable documentation of the expense you're ok.