diff --git a/.gitignore b/.gitignore
index dc4e08c..14d4c97 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ kindlegen*
 .DS_Store
 Thumbs.db
 /UnRAR.exe
+/7za.exe
diff --git a/README.md b/README.md
index 5cae032..7a2ef48 100644
--- a/README.md
+++ b/README.md
@@ -30,11 +30,13 @@ You can find the latest released binary at the following links:
 - Folders
 - CBZ, ZIP
 - CBR, RAR *(With `unrar` executable)*
+- CB7, 7Z *(With `7za` executable)*
 - PDF *(Extracting only contained JPG images)*
 
 ## OPTIONAL REQUIREMENTS
 - [KindleGen](http://www.amazon.com/gp/feature.html?ie=UTF8&docId=1000765211) v2.9+ in a directory reachable by your _PATH_ or in _KCC_ directory *(For .mobi generation)*
 - [UnRAR](http://www.rarlab.com/download.htm) *(For CBR/RAR support)*
+- [7za](http://www.7-zip.org/download.html) *(For 7z/CB7 support)*
 
 ### For compiling/running from source:
 - Python 2.7 - Included in MacOS and Linux, follow the [official documentation](http://www.python.org/getit/windows/) to install on Windows.
@@ -52,7 +54,7 @@ You can find the latest released binary at the following links:
 * Check our [wiki](https://github.com/ciromattia/kcc/wiki/Other-devices) for a list of tested Non-Kindle E-Readers.
 * The first image found will be set as the comic's cover.
 * All files/directories will be added to EPUB in alphabetical order.
-* Output MOBI file should be uploaded via USB. Other methods (e.g. via Calibre) might corrupt it.
+* Output MOBI file should be uploaded via USB. Other methods might corrupt it.
 
 ### GUI 
 
@@ -257,8 +259,9 @@ The app relies and includes the following scripts/binaries:
 * Layout of panels in Panel View mode is now automatically adjusted to content
 * Support for Virtual Panel View was removed
 * Margin color fill is now autodetected
+* Added support of 7z/CB7 files
 * Profiles for Kindle Keyboard, Touch and Non-Touch are now merged
-* Windows release is now bundled with UnRAR
+* Windows release is now bundled with UnRAR and 7za
 * Small GUI tweaks
 
 ## KNOWN ISSUES
diff --git a/kcc/KCC_gui.py b/kcc/KCC_gui.py
index 6945e80..e047446 100644
--- a/kcc/KCC_gui.py
+++ b/kcc/KCC_gui.py
@@ -321,11 +321,19 @@ class Ui_KCC(object):
             self.needClean = False
             GUI.JobList.clear()
         if self.UnRAR:
-            fnames = QtGui.QFileDialog.getOpenFileNames(MainWindow, 'Select file', self.lastPath,
-                                                        '*.cbz *.cbr *.zip *.rar *.pdf')
+            if self.sevenza:
+                fnames = QtGui.QFileDialog.getOpenFileNames(MainWindow, 'Select file', self.lastPath,
+                                                            '*.cbz *.cbr *.cb7 *.zip *.rar *.7z *.pdf')
+            else:
+                fnames = QtGui.QFileDialog.getOpenFileNames(MainWindow, 'Select file', self.lastPath,
+                                                            '*.cbz *.cbr *.zip *.rar *.pdf')
         else:
-            fnames = QtGui.QFileDialog.getOpenFileNames(MainWindow, 'Select file', self.lastPath,
-                                                        '*.cbz *.zip *.pdf')
+            if self.sevenza:
+                fnames = QtGui.QFileDialog.getOpenFileNames(MainWindow, 'Select file', self.lastPath,
+                                                            '*.cbz *.cb7 *.zip *.7z *.pdf')
+            else:
+                fnames = QtGui.QFileDialog.getOpenFileNames(MainWindow, 'Select file', self.lastPath,
+                                                            '*.cbz *.zip *.pdf')
         # Lame UTF-8 security measure
         for fname in fnames:
             try:
@@ -629,6 +637,13 @@ class Ui_KCC(object):
             self.UnRAR = False
             self.addMessage('Cannot find <a href="http://www.rarlab.com/rar_add.htm">UnRAR</a>!'
                             ' Processing of CBR/RAR files will be disabled.', 'warning')
+        sevenzaExitCode = call('7za', stdout=PIPE, stderr=STDOUT, shell=True)
+        if sevenzaExitCode == 0 or sevenzaExitCode == 7:
+            self.sevenza = True
+        else:
+            self.sevenza = False
+            self.addMessage('Cannot find <a href="http://www.7-zip.org/download.html>7za</a>!'
+                            ' Processing of CB7/7Z files will be disabled.', 'warning')
 
         GUI.BasicModeButton.clicked.connect(self.modeBasic)
         GUI.AdvModeButton.clicked.connect(self.modeAdvanced)
diff --git a/kcc/cbxarchive.py b/kcc/cbxarchive.py
index a2138f5..226e77a 100644
--- a/kcc/cbxarchive.py
+++ b/kcc/cbxarchive.py
@@ -22,6 +22,7 @@ __docformat__ = 'restructuredtext en'
 import os
 import zipfile
 import rarfile
+from subprocess import Popen, STDOUT, PIPE
 
 
 # noinspection PyBroadException
@@ -32,6 +33,8 @@ class CBxArchive:
             self.compressor = 'zip'
         elif rarfile.is_rarfile(origFileName):
             self.compressor = 'rar'
+        elif origFileName.endswith('.7z') or origFileName.endswith('.cb7'):
+            self.compressor = '7z'
         else:
             self.compressor = None
 
@@ -68,12 +71,24 @@ class CBxArchive:
                 filelist.append(f)
         cbrFile.extractall(targetdir, filelist)
 
+    def extractCB7(self, targetdir):
+        output = Popen('7za x "' + self.origFileName + '" -xr!__MACOSX -xr!.DS_Store -xr!thumbs.db -o"' + targetdir +
+                       '"', stdout=PIPE, stderr=STDOUT, shell=True)
+        extracted = False
+        for line in output.stdout:
+            if "Everything is Ok" in line:
+                extracted = True
+        if not extracted:
+            raise OSError
+
     def extract(self, targetdir):
         print "\n" + targetdir + "\n"
         if self.compressor == 'rar':
             self.extractCBR(targetdir)
         elif self.compressor == 'zip':
             self.extractCBZ(targetdir)
+        elif self.compressor == '7z':
+            self.extractCB7(targetdir)
         adir = os.listdir(targetdir)
         if len(adir) == 1 and os.path.isdir(os.path.join(targetdir, adir[0])):
             import shutil
diff --git a/kcc/comic2ebook.py b/kcc/comic2ebook.py
index e4df1ec..4ac8acb 100755
--- a/kcc/comic2ebook.py
+++ b/kcc/comic2ebook.py
@@ -569,8 +569,7 @@ def getWorkFolder(afile):
                 path = cbx.extract(workdir)
             except OSError:
                 rmtree(workdir)
-                print 'Unrar not found, please download from ' + \
-                      'http://www.rarlab.com/download.htm and put into your PATH.'
+                print 'UnRAR/7za not found or file failed to extract!'
                 sys.exit(21)
         else:
             rmtree(workdir)
diff --git a/other/Additional-LICENSE.txt b/other/Additional-LICENSE.txt
new file mode 100644
index 0000000..891d453
--- /dev/null
+++ b/other/Additional-LICENSE.txt
@@ -0,0 +1,91 @@
+ ******    *****   ******   UnRAR - free utility for RAR archives
+ **   **  **   **  **   **  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ ******   *******  ******    License for use and distribution of
+ **   **  **   **  **   **   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ **   **  **   **  **   **         FREEWARE version
+                                   ~~~~~~~~~~~~~~~~
+
+      The UnRAR utility is freeware. This means:
+
+   1. All copyrights to RAR and the utility UnRAR are exclusively
+      owned by the author - Alexander Roshal.
+
+   2. The UnRAR utility may be freely distributed. It is allowed
+      to distribute UnRAR inside of other software packages.
+
+   3. THE RAR ARCHIVER AND THE UnRAR UTILITY ARE DISTRIBUTED "AS IS".
+      NO WARRANTY OF ANY KIND IS EXPRESSED OR IMPLIED.  YOU USE AT 
+      YOUR OWN RISK. THE AUTHOR WILL NOT BE LIABLE FOR DATA LOSS, 
+      DAMAGES, LOSS OF PROFITS OR ANY OTHER KIND OF LOSS WHILE USING
+      OR MISUSING THIS SOFTWARE.
+
+   4. Neither RAR binary code, WinRAR binary code, UnRAR source or UnRAR
+      binary code may be used or reverse engineered to re-create the RAR
+      compression algorithm, which is proprietary, without written
+      permission of the author.
+
+   5. If you don't agree with terms of the license you must remove
+      UnRAR files from your storage devices and cease to use the
+      utility.
+
+      Thank you for your interest in RAR and UnRAR.
+
+
+                                            Alexander L. Roshal
+
+  7-Zip
+  ~~~~~
+  License for use and distribution
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+  7-Zip Copyright (C) 1999-2012 Igor Pavlov.
+
+  Licenses for files are:
+
+    1) 7z.dll: GNU LGPL + unRAR restriction
+    2) All other files:  GNU LGPL
+
+  The GNU LGPL + unRAR restriction means that you must follow both 
+  GNU LGPL rules and unRAR restriction rules.
+
+
+  Note: 
+    You can use 7-Zip on any computer, including a computer in a commercial 
+    organization. You don't need to register or pay for 7-Zip.
+
+
+  GNU LGPL information
+  --------------------
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You can receive a copy of the GNU Lesser General Public License from 
+    http://www.gnu.org/
+
+
+  unRAR restriction
+  -----------------
+
+    The decompression engine for RAR archives was developed using source 
+    code of unRAR program.
+    All copyrights to original unRAR code are owned by Alexander Roshal.
+
+    The license for original unRAR code has the following restriction:
+
+      The unRAR sources cannot be used to re-create the RAR compression algorithm, 
+      which is proprietary. Distribution of modified unRAR sources in separate form 
+      or as a part of other software is permitted, provided that it is clearly
+      stated in the documentation and source comments that the code may
+      not be used to develop a RAR (WinRAR) compatible archiver.
+
+
+  --
+  Igor Pavlov
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 9d95d63..35edd24 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,11 @@ elif platform == "win32":
     from cx_Freeze import setup, Executable
     base = "Win32GUI"
     extra_options = dict(
-        options={"build_exe": {"include_files": ['LICENSE.txt', ['other/UnRAR.exe', 'UnRAR.exe']], "compressed": True}},
+        options={"build_exe": {"include_files": ['LICENSE.txt',
+                                                 ['other/UnRAR.exe', 'UnRAR.exe'],
+                                                 ['other/7za.exe', '7za.exe'],
+                                                 ['other/Additional-LICENSE.txt', 'Additional-LICENSE.txt']
+                                                 ], "compressed": True}},
         executables=[Executable(MAIN,
                                 base=base,
                                 targetName="KCC.exe",