The Open Content Photography Program is being built to help people to learn professional photography. It is not a book about photography, it's a book about learning photography on your own.
For photographers art history is very important to keep an open mind, and to know the evolution of other arts that can be considered forerunners of photography.
Traditional and digital photography techniques have a lot in common. Whatever tools you use, it's important to understand the fundamental techniques of the medium.
Does a traditional darkroom make sense in a digital age? It is an excellent way to learn photography. Also, traditionally produced images still carry a cachet for some galleries and collectors.
The "digital darkroom" is what photographers call the computer software they use to process images. Knowing how to use digital tools is essential for a practicing photographer today.