Pop up video ads and complex navigation

I’m pretty tech savvy, but I couldn’t really figure out where the library was displayed in this app. I think at one point I identified it (it wasn’t called the library or anything you would guess to be the place to find your books), and when I tapped a book title to open it, the thing popped a TV ad for a retailer up in my face. I don’t see why anyone would use this app.

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