I am a happy customer of O'Reilly Learning. I do not even earn US level salary, but for a few hundred dollars annually I get access to a massive collection of b

I am a happy customer of O'Reilly Learning. I do not even earn US level salary, but for a few hundred dollars annually I get access to a massive collection of books, training videos, live training, interactive coding and much more. In my country (Australia) self education is tax deductible as well. I consider this a small investment for my career.