If you are paying your own tuition and book money, then your father really doesn't have the right to demand an accounting of where and what you spend. Sometimes when parents foot the college bill they feel they have a right to your grade reports, your bank statements, your life. Its a "do as I say or the money is withdrawn". In such a situation you may need to think about how much your freedom means to you and how willing you are to answer financial demands made by your family.

I put myself through college - it took a long time to finish but I did finish. My father pulled the same stunt in that he demanded an accounting of every penny spent during a school quarter - and that money was mine. My family contributed NOTHING towards my tuition or living expenses. And yet, my father was demanding an accounting of expenses. But, I needed a place to stay during breaks and during summer break. And so I complied and provided a detailed list of my expenses. I hated every minute of the ordeal as it was humiliating to be treated in that manner. The following year I moved completely out of my parent's house and cut all financial ties. It was difficult but worth the price.

Good luck to you.