I just discovered this website that allows you to create your own text books and then download and print them. You pull for other chapters, books, etc on the site to create your own custom curriculum.
Next Generation Textbooks
CK-12 allows one to customize and produce content by re-purposing to suit what needs to be taught, using different modules that may suit a learner's learning style, region, language, or level of skill, while adhering to the local education standards.
Flexibility + Textbook =FLEXBOOKS