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* Update free-programming-books.md Added in 3 free programming books: [Haskell Notes for Professionals](https://goalkicker.com/HaskellBook/) (PDF) [Linux commands Notes for Professionals](https://goalkicker.com/LinuxBook/) (PDF) [JavaScript Notes for Professionals](https://goalkicker.com/JavaScriptBook/) (PDF) * Update free-programming-books.md * Update free-programming-books.md * Update free-programming-books.md Add The Joy of Cryptography (2020) book to the mathematics section. * Update free-programming-books.md Add Haskell Notes for Professionals * Update free-programming-books.md Add Linux commands Notes for Professionals * Update free-programming-books.md Add JavaScript Notes for Professionals * Update free-programming-books.md
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