Hi HN, my name is Rahul Sarathy and I built Homer ( a tool to allow creators to build more interactive digital textbooks.Right now the software supports image based scrollytelling with a roadmap to add interactive components such as annotations, animations, backlinks, and more.You can check out a demo of an interactive history book here: 
Here's another short example of how a personal finance related book could look like:  you're interested in checking out the UI used to build the demo above, feel free to sign up at  and create a book.