Added Books Sharing App Idea In Advanced Repo

Projects/3-Advanced/Book-Sharing-App.md

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+# Books Sharing App
+
+**Tier:** 3-Advanced
+
+Books Sharing App is a simple application that allows users to sell books to other users.
+
+It gives students the platform where they can sell their books, notes that they made during their studies and get paid off.
+
+It also includes the pdfs of the books and notes that are uploaded by the users.
+
+## Features
+
+-   [ ] User can sell books
+-   [ ] User can buy books
+-   [ ] User can sell notes
+-   [ ] User can buy notes
+-   [ ] User can upload pdfs
+
+## Bonus features
+
+-   [ ] User can asked for publisher to share the original photos of the books and notes
+-   [ ] User can contact the publisher for more details
+-   [ ] User can asked publisher for giving the book or note on rental
+
+## Useful links and resources
+
+Libraries/Frameworks for building applications:
+
+-   [ReactJS](https://react.dev/)
+-   [NextJS](https://nextjs.org/)
+
+It up to you to choose the best framework/library for your project.
+
+## Deployed projects
+
+You can refer the following deployed projects.
+
+-   [BookIO](https://bookio-5c798.firebaseapp.com/books)
+
+If you want to see the code of the project, you can refer the following link.
+
+-   [BookIO Github](https://github.com/bt-s/BOOKIO)