Friday night library posting ittpic.twitter.com/nKkL8mUosn
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Huh, I flip through paperbacks more easily... also i do things like mark up the outside to show chapter divisions, I wouldn't do that on an expensive book
btw if it were only $20 more like Kantbot says i might buy more hardback but sometimes it's like $40 paper, $120 cloth
yeah i compulsively browse the math section of used bookstores for that very reason. Quality never more important than with lots of formulae
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