diff --git a/oloturia2pdf.py b/oloturia2pdf.py
index 9f49a12..b24252e 100755
--- a/oloturia2pdf.py
+++ b/oloturia2pdf.py
@@ -257,51 +257,54 @@ def main():
     print("Genero i libretti")
     os.makedirs('books', exist_ok=True)
     for pagstart in range(1, len(vgo_dict), 50):
-        pdfWriter = PyPDF2.PdfFileWriter()
-
         book_num = int(pagstart / 50) + 1
         pagend = min(book_num * 50, len(vgo_dict))
-
-        print(book_num)
-
-        # aggiungere copertina
-        pdfWriter.addPage(copertina(str(pagstart).zfill(3) + " - " + str(pagend).zfill(3)))
         
-        pdfWriter.addBlankPage()
+        book_name = os.path.join('books', 'vgo_' + str(book_num).zfill(2) + '.pdf')
+        if not os.path.isfile(book_name):
+            pdfWriter = PyPDF2.PdfFileWriter()
+            print(book_num)
 
-        indtext = ""
-        for vgo_num in [str(x).zfill(3) for x in range(pagstart, pagend + 1)]:
-            pdf_name = os.path.join('pdf', vgo_num + '.pdf')
+            # aggiungere copertina
+            pdfWriter.addPage(copertina(str(pagstart).zfill(3) + " - " + str(pagend).zfill(3)))
             
-            try:
-                #print(vgo_num + " - " + vgo_dict[vgo_num])
-                indtext = indtext + vgo_num + "\t" + vgo_dict[vgo_num] + "\n"
-                pdfFileObj = open(pdf_name, 'rb')
-                pdfReader = PyPDF2.PdfFileReader(pdfFileObj)
-                pageObj = pdfReader.getPage(0)
-                pdfWriter.addPage(pageObj)
-            except:
-                pass
-        
-        for i in range(0, 8 - ((((pagend - 1) % 50) + 1 + 5) % 8)):
             pdfWriter.addBlankPage()
 
-        # aggiungere indice
-        for indpag in indice(indtext):
-            pdfWriter.addPage(indpag)
+            indtext = ""
+            for vgo_num in [str(x).zfill(3) for x in range(pagstart, pagend + 1)]:
+                pdf_name = os.path.join('pdf', vgo_num + '.pdf')
+                
+                try:
+                    #print(vgo_num + " - " + vgo_dict[vgo_num])
+                    indtext = indtext + vgo_num + "\t" + vgo_dict[vgo_num] + "\n"
+                    pdfFileObj = open(pdf_name, 'rb')
+                    pdfReader = PyPDF2.PdfFileReader(pdfFileObj)
+                    pageObj = pdfReader.getPage(0)
+                    pdfWriter.addPage(pageObj)
+                except:
+                    pass
+            
+            for i in range(0, 8 - ((((pagend - 1) % 50) + 1 + 5) % 8)):
+                pdfWriter.addBlankPage()
 
-        #Aggiungere pagina finale
-        #pdfWriter.addBlankPage()
-        pdfFileObj = open("quarta.pdf", 'rb')
-        pdfReader = PyPDF2.PdfFileReader(pdfFileObj)
-        pageObj = pdfReader.getPage(0)
-        pdfWriter.addPage(pageObj)
+            # aggiungere indice
+            for indpag in indice(indtext):
+                pdfWriter.addPage(indpag)
 
-        book_name = os.path.join('books', 'vgo_' + str(book_num).zfill(2) + '.pdf')
-        with open(book_name, 'wb') as pdfOutput:
-            pdfWriter.write(pdfOutput)
+            #Aggiungere pagina finale
+            #pdfWriter.addBlankPage()
+            pdfFileObj = open("quarta.pdf", 'rb')
+            pdfReader = PyPDF2.PdfFileReader(pdfFileObj)
+            pageObj = pdfReader.getPage(0)
+            pdfWriter.addPage(pageObj)
 
-        
+            with open(book_name, 'wb') as pdfOutput:
+                pdfWriter.write(pdfOutput)
+
+    # # Genera indice
+    # with open("index.txt", 'w') as handler:
+    #     for key in sorted(vgo_dict):
+    #         handler.write(key + ' - ' + vgo_dict[key] + '\n')
 
 
 if __name__ == "__main__":