Single-Gesture Book Navigation

I've been wanting to explore repurposing the side menu as a single-gesture method for navigating a book with multiple books/chapters/modules/etc. Here's my first approach to the concept, using a spring-pop to get the side menu "out in front" of the user's finger, so they can see the rest of the book's hierarchy.

Hope to build this out more in the future, but thanks for checking it out!