diff --git a/src/libprs500/ebooks/__init__.py b/src/libprs500/ebooks/__init__.py
index 9337c5d331..07158a0ea5 100644
--- a/src/libprs500/ebooks/__init__.py
+++ b/src/libprs500/ebooks/__init__.py
@@ -22,4 +22,7 @@ class ConversionError(Exception):
     pass
 
 class UnknownFormatError(Exception):
-    pass
\ No newline at end of file
+    pass
+
+BOOK_EXTENSIONS = ['lrf', 'lrx', 'rar', 'zip', 'rtf', 'lit', 'txt', 'htm', 
+                   'html', 'xhtml', 'epub', 'pdf', 'prc', 'mobi', 'azw']
diff --git a/src/libprs500/gui2/__init__.py b/src/libprs500/gui2/__init__.py
index 962b81e66a..eb90153bdd 100644
--- a/src/libprs500/gui2/__init__.py
+++ b/src/libprs500/gui2/__init__.py
@@ -25,8 +25,6 @@ from libprs500 import __author__, islinux, iswindows
 
 NONE = QVariant() #: Null value to return from the data function of item models
 
-BOOK_EXTENSIONS = ['lrf', 'lrx', 'rar', 'zip', 'rtf', 'lit', 'txt', 'htm', 
-                   'html', 'xhtml', 'epub', 'pdf']
 
 # Turn off DeprecationWarnings in windows GUI
 if iswindows:
diff --git a/src/libprs500/gui2/dialogs/metadata_single.py b/src/libprs500/gui2/dialogs/metadata_single.py
index cbda631328..cb0b375032 100644
--- a/src/libprs500/gui2/dialogs/metadata_single.py
+++ b/src/libprs500/gui2/dialogs/metadata_single.py
@@ -23,10 +23,11 @@ from PyQt4.QtGui import QPixmap, QListWidgetItem, QErrorMessage, QDialog
 
 
 from libprs500.gui2 import qstring_to_unicode, error_dialog, file_icon_provider, \
-                           choose_files, pixmap_to_data, BOOK_EXTENSIONS, choose_images
+                           choose_files, pixmap_to_data, choose_images
 from libprs500.gui2.dialogs.metadata_single_ui import Ui_MetadataSingleDialog
 from libprs500.gui2.dialogs.fetch_metadata import FetchMetadata
 from libprs500.ebooks.BeautifulSoup import BeautifulSoup
+from libprs500.ebooks import BOOK_EXTENSIONS
 
 class Format(QListWidgetItem):
     def __init__(self, parent, ext, path=None):
diff --git a/src/libprs500/gui2/main.py b/src/libprs500/gui2/main.py
index c384019739..06396646f7 100644
--- a/src/libprs500/gui2/main.py
+++ b/src/libprs500/gui2/main.py
@@ -33,7 +33,7 @@ from libprs500.ebooks.lrf.any.convert_from import main as any2lrf
 from libprs500.devices.errors import FreeSpaceError
 from libprs500.devices.interface import Device
 from libprs500.gui2 import APP_UID, warning_dialog, choose_files, error_dialog, \
-                           initialize_file_icon_provider, BOOK_EXTENSIONS, \
+                           initialize_file_icon_provider, \
                            pixmap_to_data, choose_dir, ORG_NAME, \
                            qstring_to_unicode, set_sidebar_directories
 from libprs500.gui2.main_window import MainWindow
@@ -53,6 +53,7 @@ from libprs500.gui2.lrf_renderer.main import option_parser as lrfviewerop
 from libprs500.library.database import DatabaseLocked
 from libprs500.ebooks.metadata.meta import set_metadata
 from libprs500.ebooks.metadata import MetaInformation
+from libprs500.ebooks import BOOK_EXTENSIONS
 
 
 class Main(MainWindow, Ui_MainWindow):