As you can see in the video demo above, you can add your books and delete them. This web app also has input validation, preventing the user from submitting the form, even if only one input field is empty.
In terms of where to use this web app, it’s up to you guys, really, where you’ll use this. The only thing I could think of is to use this to list up all the books that you’ve read. Or maybe even list down all the books that you’ve collected, if you are a book collector.