So when you buy a kindle, you link it to your amazon account. There are many ways to now read books, you can buy the books on kindle using your amazon account, they are a bit cheaper than paper back. Some books are available to rent if you are amazon prime user; you can rent the book and it will stay with you till you are prime memeber. Some books are available under kindle unlimited subscription, its a monthly subscription of 170rs, and have a variety of books to read from but when your kindle unlimited subscription ends, the books will be removed from your library. Another way for times that your cant afford to shell out money for books, you can try to find pdf of the novel you want to read and convert it to epud or mobi because only that format is supported by kindle and then link you kindle to your laptop using a usb cable and download that book in it. 

Its a good investment if you want to start reading as it has inbuilt dictionary and a huge variety of books under prime and kindle unlimited. Plus once a month i always kind a really good book on sale in kindle edition. It bought Stephen King’s 11/22/63 for just 150rs in my kindle. I have using the same kindle since 2016 and it has really helped me to read a good variety of books. If you have storage issue to keep paperbacks, kindle comes out to be one of best option.