> Digital textbooks can offer so much more than print textbooks. They can have embedded interactive content, ranging from extremely zoomable 2D content to see s

> Digital textbooks can offer so much more than print textbooks. They can have embedded interactive content, ranging from extremely zoomable 2D content to see something in detail to rotatable 3D models. They can have videos. Or just audio, say to listen to case studies or know how a bird sounds. They can have automatically gradable quizzes and exercises. There is so much more digital books can offer. Yes yes yes yes! I love your thinking. I'd love to see a startup specifically targeting this-- A new type of publication. You pay for it like an e-book, but it's interactive like an application, and super high quality. Maybe we could start with programming books? Take the best of the programming books out there and re-interpret them as this new sort of interactive product.