Add an option to move books between shelves.

The repository below and the consent message of 9292.nl is a good starting point.

https://github.com/studio24/cookie-message

Shelf types can be;

Book
Todo
Movie
Link
Etc

Display types with background images or icons.

Make a design for the book detail page and apply book search page design to shelf detail page.

If there is not any book in the shelf, encourage to add a book.

Check the shelf is public still.

This article will help https://docs.microsoft.com/en-us/aspnet/core/client-side/less-sass-fa

There are no external authentication services configured. See this article for details on setting up this ASP.NET application to support logging in via external services.

Give an option to the user to redirect to the shelf that the book is added.

Hide deleted books on profile page