The answer is simple. Developers are victims of their own success. Talented developers are in such high demand that book publishing cannot compete with what the

The answer is simple. Developers are victims of their own success. Talented developers are in such high demand that book publishing cannot compete with what they can earn. Conferences and training vendors cannot afford to pay them properly based on the current industry model. Instead, you get a selection of developers at conferences who write and teach because they enjoy doing so. The training vendors only get what's left... People who need the job.