If you don't want to buy them right now, you can suggest a purchase to your local library. Just write down the title, author's name, and ISBN. They'll have you fill out a form. Some libraries have a website form. If it's purchased the library will notify you, and you can place a hold. I do it all the time. You can probably get them through an ILL if they don't purchase them. You'll have to fill out an Inter Library Loan request form, but sometimes you have to pay the shipping.