Merge doc for ebook and cover

docs/SUMMARY.md

@@ -24,10 +24,10 @@
     * [HTML](syntax/markdown.md#html)
     * [Footnotes](syntax/markdown.md#footnotes)
 * [AsciiDoc](syntax/asciidoc.md)
+* [eBook and PDF](ebook.md)
 
 ### Customization
 
-* [Cover](cover.md)
 * [Templating](templating/README.md)
     * [Content References](templating/conrefs.md)
     * [Variables](templating/variables.md)

docs/cover.md

@@ -1,21 +0,0 @@
-# Cover
-
-Covers are used for all the ebook formats, and to make books more elegant on GitBook.com.
-
-To provide a cover, place a **cover.jpg** file at the root directory of your book. Adding a **cover_small.jpg** will specify a smaller version of the cover. The cover should be a **JPEG** file.
-
-### Best Sizes
-
-|                     |     Big     |       Small       |
-|:-------------------:|:-----------:|:-----------------:|
-|       **File**      | `cover.jpg` | `cover_small.jpg` |
-| **Size(in pixels)** |  1800x2360  |      200x262      |
-
-### Guidelines
-
-A good cover respects the following guidelines:
-
-* No border
-* Clearly visible book title
-* Any important text should be visible in the small version
-

docs/ebook.md

@@ -0,0 +1,29 @@
+# Generating eBooks and PDFs
+
+GitBook can generates a website, but can also output content as ebook (ePub, Mobi, PDF).
+
+### Installing ebook-convert
+
+`ebook-convert` is required to generate ebooks (epub, mobi, pdf).
+
+##### OS X
+
+Download the [Calibre application](https://calibre-ebook.com/download). After moving the `calibre.app` to your Applications folder create a symbolic link to the ebook-convert tool:
+
+```
+$ sudo ln -s ~/Applications/calibre.app/Contents/MacOS/ebook-convert /usr/bin
+```
+
+You can replace `/usr/bin` with any directory that is in your $PATH.
+
+### Cover
+
+Covers are used for all the ebook formats. It's an important part of an ebook brandline.
+
+A good cover should respect the following guidelines:
+
+* Size of 1800x2360 (pixels)
+* No border
+* Clearly visible book title
+* Any important text should be visible in the small version
+