Calibre is an e-book library management tool designed for Kindle and other similar devices. Kovid Goyal created it, and it was written in the C and Python programming languages. It runs on Microsoft Windows, Mac OS, and GNU/Linux and is cross-platform. It also comes with a smartphone app.
Calibre’s main purpose is to organise and index the eBooks that the user has bought. This programme organises and presents them in an intuitive and orderly manner, making it simple to identify them according to a variety of requirements, making it far easier to locate the desired files than, say, Lucidor.

Calibre allows you to order e-books in a variety of ways.
The procedure is simple and fast. Calibre allows users to arrange their e-book library by title (alphabetical order), author, size, date of publication or storage, classification, publisher, or sequence, to name a few.

Calibre can read and write a variety of file formats.
Before entering them into the eReader, we must first list the supported input formats, or those that it can support. HTML, TXT, RTF, PDF, cbc, MOBI, ODT, PML, RB, prc, pdb, lit, fb2, and, of course, ePub are among them. It can also read and write cbr and cbz comic scripts.
You can also convert any of those formats to ePub, ePub3, OEB, lrf, fb2, EB, MOBI, pdb, rb, and pml and export them to an e-book reader in any of the following formats: ePub, ePub3, OEB, lrf, fb2, EB, MOBI, pdb, rb, and pml. Both of them are powered by the vast majority of today’s reading devices.

Calibre supports metadata.
Calibre allows users to add comments to each electronic book they manage, and these comments are available on the reading screen. This is useful for describing the eBook’s content, for example. Labels from a fully versatile classification scheme may also be included.

How do I use Calibre to convert an ePub to a Kindle?
Since the Kindle, Amazon’s e-reader, does not support ePub, this conversion feature is without a doubt one of the most common. To begin, download and run the installer on your PC or Mac. Follow the on-screen instructions before the software is ready to use. After that, double-click the shortcut.
You’ll find yourself in the main interface. Now find the ePub book you want to read on Kindle and drag it to the centre of your set. Then attach your eReader to your computer through USB, and the software will recognise it automatically. At this point, all you have to do is click “Add to device.” The file will be open in a few seconds.

What is the aim of the Kindle News Finder?
This is a feature that allows you to have Kindle gather and submit news from RSS repositories to your book reader automatically. This is the case for BBC News, The New York Times, and The Economist, for example. As a result, you can use it to stay updated on a daily basis.

Finally, the most convenient and adaptable way to handle your eBook collection
Calibre, in short, comes in a variety of versions that make it easy to organise and manage any electronic book collection, no matter how big. In reality, due to its high compatibility with formats, reading devices, and operating systems, it is currently the user’s preferred option.