Thank you for your question.
It depends. If you are running a business and your main line of business is daytrading, then you may be able to deduct the book expense. However, if you are just trading on your own time and not doing it as a living, then you won't be able to deduct the book expense.
For more information, please see the link below:
What Kind of Expenses Can You Claim for Your Small Business?
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