diff --git a/DeDRM_Macintosh_Application/DeDRM.app/Contents/Resources/genbook.py b/DeDRM_Macintosh_Application/DeDRM.app/Contents/Resources/genbook.py
index 3ed925d..4036896 100644
--- a/DeDRM_Macintosh_Application/DeDRM.app/Contents/Resources/genbook.py
+++ b/DeDRM_Macintosh_Application/DeDRM.app/Contents/Resources/genbook.py
@@ -385,7 +385,7 @@ def generateBook(bookDir, raw, fixedimage):
     # print "first normal text page is", spage
 
     # get page height and width from first text page for use in stylesheet scaling
-    pname = 'page%04d.dat' % (pnum + 1)
+    pname = 'page%04d.dat' % (pnum - 1)
     fname = os.path.join(pageDir,pname)
     flat_xml = convert2xml.fromData(dict, fname)
 
diff --git a/DeDRM_Windows_Application/DeDRM_App/DeDRM_lib/lib/genbook.py b/DeDRM_Windows_Application/DeDRM_App/DeDRM_lib/lib/genbook.py
index 3ed925d..4036896 100644
--- a/DeDRM_Windows_Application/DeDRM_App/DeDRM_lib/lib/genbook.py
+++ b/DeDRM_Windows_Application/DeDRM_App/DeDRM_lib/lib/genbook.py
@@ -385,7 +385,7 @@ def generateBook(bookDir, raw, fixedimage):
     # print "first normal text page is", spage
 
     # get page height and width from first text page for use in stylesheet scaling
-    pname = 'page%04d.dat' % (pnum + 1)
+    pname = 'page%04d.dat' % (pnum - 1)
     fname = os.path.join(pageDir,pname)
     flat_xml = convert2xml.fromData(dict, fname)
 
diff --git a/DeDRM_calibre_plugin/DeDRM_plugin/genbook.py b/DeDRM_calibre_plugin/DeDRM_plugin/genbook.py
index 3ed925d..4036896 100644
--- a/DeDRM_calibre_plugin/DeDRM_plugin/genbook.py
+++ b/DeDRM_calibre_plugin/DeDRM_plugin/genbook.py
@@ -385,7 +385,7 @@ def generateBook(bookDir, raw, fixedimage):
     # print "first normal text page is", spage
 
     # get page height and width from first text page for use in stylesheet scaling
-    pname = 'page%04d.dat' % (pnum + 1)
+    pname = 'page%04d.dat' % (pnum - 1)
     fname = os.path.join(pageDir,pname)
     flat_xml = convert2xml.fromData(dict, fname)