how to extract some stuff

Signed-off-by: Nico Schottelius <nico@freiheit.schottelius.org>

blog/how-to-extract-your-amazon-ebooks-from-the-android-kindle-app.mdwn

@@ -0,0 +1,73 @@
+[[!meta title="How to extract your Amazon ebooks from the Android Kindle App"]]
+
+## TL;DR
+
+The ebooks of the Amazon Kindle app can be found on your
+Android phone in PRC format below the folder
+***/data/media/0/Android/data/com.amazon.kindle/files/***.
+
+## Download the books
+
+To be able to extract your books from your Android phone, you need to
+synchronise the books first, so they are available on your device.
+
+To ensure they are local. turn of all network connections 
+(wifi, mobile data) and try to read them.
+
+## Finding the files
+
+At first I guessed the files I was looking for may be
+ending in ***.azw***. Looking for these files, however
+did not reveal any file.
+
+My second guess was to look for amazon files or folder
+named amazon:
+
+    % find / -name \*amazon\* 2>/dev/null
+
+I found **/data/data/com.amazon.kindle**, with the following content:
+
+    % ls
+    app_com.amazon.device.syncHIGH    app_metricsNORMAL                 databases
+    app_com.amazon.device.syncNORMAL  app_web_cache                     files
+    app_dex                           app_web_database                  lib
+    app_dexopt                        app_webview                       shared_prefs
+    app_metricsHIGH                   cache
+
+Looking for books in this directory wasn't successful. 
+However, the databases directory looked interesting.
+
+    % cd databases
+    % grep -ri mybookname *
+    Binary file databases/kindle_library.db matches
+    Binary file databases/kindle_library.db-journal matches
+
+I used sqlite to have a look at the database:
+
+    % sqlite3 kindle_library.db
+    sqlite> .schema
+    ...
+
+This revealed one interesting table named ***LocalContent***.
+Looking at it closer:
+
+    sqlite> select * from LocalContent;
+
+This revealed the emulated path 
+***/storage/emulated/0/Android/data/com.amazon.kindle/files/***
+and referenced ***.prc*** files. 
+
+I looked for them in the filesystem using ...
+
+    % find / -name \*.prc 2>/dev/null
+
+... and found my books!
+
+To extract the books to your computer, you can use any file copy program.
+The ***rsync*** utility however is suited for it very well, as it can
+(re-)sychronise the whole folder:
+
+    % rsync -av /data/media/0/Android/data/com.amazon.kindle/files/ mycomputer:mybooks/
+
+
+[[!tag amazon android kindle ebook hack]]