^The library. I use the library a lot. I read a lot of stuff that is difficult to find sometimes and the costs would be exorbitant if I didn't use the library. I did keep track of the cost of books in my spreadsheet and for my list of 70 countries the cost would have been $930.73 (without any shipping.) Many books were only available in paper and sometimes only used. Two were over $50 to purchase. I rely heavily on my library or I'd never be able to complete my challenges.
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