You can drag and drop images onto the cover to change it and also right click to copy/paste cover images. calibre can even generate a default cover with basic metadata on it for you.

Alternatively you can specify a file on your computer to use as the cover. You can ask calibre to download book covers for you, provided the book has a known ISBN. You can add a new format, delete an existing format and also ask calibre to set the metadata and cover for the book entry from the metadata in one of the formats.

In the Available formats section of the Edit metadata dialog, you can manage these formats. calibre automatically manages multiple formats for you. For example you may have obtained the Complete Works of Shakespeare in EPUB format and later converted it to MOBI to read on your Kindle. In calibre, a single book entry can have many different formats associated with it. If no matches are found, try making your search a little less specific by including only some key words in the title and only the author last name. If you fill in the ISBN field first, it will be used in preference to the title and author. calibre will present you with a list of books that most closely match the title and author. To use the download, fill in the title and author fields and click the Fetch metadata button. The metadata download can fill in Title, author, series, tags, rating, description and ISBN for you. Currently, calibre uses Google Books and Amazon. The nicest feature of the edit metadata dialog is its ability to automatically fill in many metadata fields by getting metadata from various websites. The author sort box will be red if the author sort value differs from what calibre thinks it should be. The “Ids” box can be used to enter an ISBN (and many other types of id), it will have a red background if you enter an invalid ISBN. You can click the button next to tags to use the Tag editor to manage the tags associated with the book.

This dialog can be opened by clicking and holding the button next to author sort. Use the Manage authors dialog to see and change the authors’ sort values.

You can click the button next to author sort to have calibre automatically fill it in using the sort values stored with each author. You can click the button in between title and authors to swap them automatically.

Where to download calibre