I’m surprised when people complain about the price of a book like Functional Programming, Simplified. First, it’s less expensive than most other books on functional programming. Second, it’s a big book that took me nearly two years to research and write.
Third — and most importantly — I’ve invested thousands of dollars in books, training classes, and conferences to make myself a better programmer. I truly think of a good book as an investment in knowledge and my career, not an expense. Shoot, I once read one book that helped me start a multi-million dollar consulting business.