This API uses the four main http methods, GET, POST, PUT and DELETE.
The API simulates the following operations done on a book shelf,
getting a book
adding a book
replacing a book
permanently removing a book from the shelf.
Routes for the operations are
GET
all books available in the shelf/
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GET
a book by id/:id
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POST
add a new book/newbook/:book/:status
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PUT
update reading status of a book/update/:id/:status
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DELETE
permanently remove a book from the shelf/delete/:id
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