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# Calibre
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[Calibre](https://calibre-ebook.com/) is a cross-platform, free and open-source
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software suite for [e-book](/wiki/e-books.md) management.
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It supports various formats aswell as conversion between them.
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## Usage
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## Adding a Plugin
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A plugin by a third party can be added by selecting a `.zip` archive - usually
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named `<plugin name>_plugin.zip` - under Preferences, Plugins, Load plugin from
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file.
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## Exporting Books
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Books can be exported by selecting them and pressing `Save to disk`.
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After selecting a path the books will be saved there.
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Preferences for this can be set under `Preferences` and `Saving books to disk`.
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Especially the creation of separate image and metadata files are often of
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interest.
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The template defines the path structure of the saved books.
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A simple template that will create the following structure is
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`{author_sort:re( &,;)}/{title}/{authors}_-_{title}`.
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```txt
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thomas_schickinger;_angelika_steger/diskrete_strukturen_2/thomas_schickinger_&_angelika_steger_-_diskrete_strukturen_2.pdf
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```
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This assumes the sort author names and sort titles are set as described in
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[the following section](#changing-the-default-author-and-title-sort).
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In the same view only the boxes `Save cover separately`, `Save metadata in a separate OPF file` and
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`Save data file as well` should be unchecked.
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All others are used to ensure a lowercase directory and file name without special characters.
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## Changing the Default Author and Title Sort
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Under `Preferences` and `Tweaks` the corresponding settings to change the title
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and author sort name can be found.
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`Author sort name algorithm` defines the author sort name.
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By setting `author_sort_copy_method = 'copy'` the author sort name is the same
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as the author name.
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After this setting has been changed right click `Authors` in the navigation bar
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on the left side and press `Manage Authors`.
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Then press `Recalculate all author sort values` for the change to take effect.
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`Control sorting of titles and series in the library display` defines the sort
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titles.
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Setting `title_series_sorting = 'strictly_alphabetic'` will use the standard
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title and wont make articles of titles suffixes.
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Afterwards select all books, right-click and select `Edit metadata in bulk`
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under `Edit metadata`.
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Then check the box `update title sort` and press `Ok` to update all sort titles.
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This entry is based on two posts on mobileread - one regarding the
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[sort author name](https://www.mobileread.com/forums/showthread.php?t=314663)
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and the other regarding the
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[sort title](https://www.mobileread.com/forums/showthread.php?t=249870).
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## Transfer Books to a Device
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To transfer books to a device connect a e-reader to the computer.
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After a while calibre should recognize the device which will be apparent by the appearance of
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additional buttons on the top menu like the `Send to device`- and the `Device`-Button.
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First make sure only the formats you want will be transfered.
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This can be done by selecting `Device`, `File formats` and checking the formats as needed.
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Afterwards select the books and press `Send to device` to start the process of transfering the
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devices.
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Alternatively only specific formats of the books can be send to the device by selecting
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`Send specific format to` and `Main memory` under the `Send to device` menu.
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If there are books that contain series metadata make sure to disconnect the e-reader once and
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reconnect it.
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Afterwards select `Update cached metadata on device` under `Device` to update the metadata
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including the series.
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Finally disconnect the device.
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## KEPUB Format
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The `.kepub` format is a format that is similar to a normal epub but has some performance
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improvements for Kobo devices.
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It is recommended to convert `.mobi` and `.epub` files to a `.kepub` file before
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[transfering it to a Kobo device](#transfer-books-to-a-device).
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For this the Plugin `KePub Output` by Joel Goguen [can be added](#adding-a-plugin).
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Afterwards books can be converted the normal way, but now the output format `.kepub` is available.
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