Humble Bundle - Sir Terry Pratchett's Discworld
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Humble Bundle
https://www.humblebundle.com/books/terry-pratchetts-discworld-harpercollins-encore-books
Pay what you want. Support charity. Get awesome games.
39 titles for $18 and up. Good for another ~2 weeks. DRM'd but, uh, doesn't Calibre just have the neatest plugins?