Just finished Buddenbrooks by Thomas Mann. One of the best books I've read, ever. It's long and tedious, and if you like getting lost in minute descriptions of mundane objects and daily routines of people who lived in past eras, then you'll love it and feel sad when it's over. I also find books like this to be a great antidote to the pace of current life, where you're pressured to "read n books in 1 year" or you're not deemed a proper reader. Next up is going to be Lonesome Dove, suggested by someone in this very thread!
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