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No, there isn't. The 1st edition was one of the bestselling technical books of the past 10 years (easily top 3) and the royalties didn't make a material amount of money (annualized). If you have the skills to write a good technical book then you can get a job that pays a multiple
You should write such books for the love of teaching, not for the money. In my opinion writing is a great way to (indirectly) connect with lots of people in a positive and constructive way.
Where can I find a free pdf copy of the 2nd ed.? Respect
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