I'm so sorry Aimee, I went through something very similar with my mother, except her vice was lottery tickets instead of smoking (but she still suffered financially). I remember finding hundreds and hundreds of dollars' worth of her scratch tickets, she's especially fond of Bingo scratch-offs. She'd always complain about having no money, even though my parents had a respectable combined income, and she also had thousands of dollars in credit card debt (because any time she got a new card she would immediately max it out buying useless things).I once did the math and the cost of her habit is $200-$300 monthly, which we really can't afford, but any time I try to bring it up to her she just starts screaming.
I really remember this time when I was about 22, I was just out of college and I was working part time helping with an insurance adjusting company, and I treated myself to a nice new jacket. I remember my mother complaining "I don't have a new jacket ..." and she totally sucked my enjoyment out of it (probably part of my complex I have now with buyer's remorse). I'm so sorry your mother gave you such a hard time over just an $8 second hand book, like are you supposed to give every penny you have to fund her addiction or something?