@Override
 public void detectLanguageAndEncoding(Book book) throws BookReadingException {
   InputStream stream = null;
   try {
     stream = book.File.getInputStream();
     final PdbHeader header = new PdbHeader(stream);
     PdbUtil.skip(stream, header.Offsets[0] + 16 - header.length());
     if (PdbUtil.readInt(stream) != 0x4D4F4249) /* "MOBI" */ {
       throw new BookReadingException("unsupportedFileFormat", book.File);
     }
     final int length = (int) PdbUtil.readInt(stream);
     PdbUtil.skip(stream, 4);
     final int encodingCode = (int) PdbUtil.readInt(stream);
     final Encoding encoding = supportedEncodings().getEncoding(encodingCode);
     final String encodingName = encoding != null ? encoding.Name : "utf-8";
     book.setEncoding(encodingName);
     PdbUtil.skip(stream, 52);
     final int fullNameOffset = (int) PdbUtil.readInt(stream);
     final int fullNameLength = (int) PdbUtil.readInt(stream);
     final int languageCode = (int) PdbUtil.readInt(stream);
     book.setLanguage(
         ZLLanguageUtil.languageByIntCode(languageCode & 0xFF, (languageCode >> 8) & 0xFF));
   } catch (IOException e) {
     throw new BookReadingException(e, book.File);
   } finally {
     if (stream != null) {
       try {
         stream.close();
       } catch (IOException e) {
       }
     }
   }
 }
 @Override
 public void readMetaInfo(Book book) throws BookReadingException {
   InputStream stream = null;
   try {
     stream = book.File.getInputStream();
     final PdbHeader header = new PdbHeader(stream);
     PdbUtil.skip(stream, header.Offsets[0] + 16 - header.length());
     if (PdbUtil.readInt(stream) != 0x4D4F4249) /* "MOBI" */ {
       throw new BookReadingException("unsupportedFileFormat", book.File);
     }
     final int length = (int) PdbUtil.readInt(stream);
     PdbUtil.skip(stream, 4);
     final int encodingCode = (int) PdbUtil.readInt(stream);
     final Encoding encoding = supportedEncodings().getEncoding(encodingCode);
     final String encodingName = encoding != null ? encoding.Name : "utf-8";
     book.setEncoding(encodingName);
     PdbUtil.skip(stream, 52);
     final int fullNameOffset = (int) PdbUtil.readInt(stream);
     final int fullNameLength = (int) PdbUtil.readInt(stream);
     final int languageCode = (int) PdbUtil.readInt(stream);
     book.setLanguage(
         ZLLanguageUtil.languageByIntCode(languageCode & 0xFF, (languageCode >> 8) & 0xFF));
     PdbUtil.skip(stream, 32);
     int offset = 132;
     if ((PdbUtil.readInt(stream) & 0x40) != 0) {
       PdbUtil.skip(stream, length - 116);
       offset = length + 20;
       if (PdbUtil.readInt(stream) == 0x45585448) /* "EXTH" */ {
         PdbUtil.skip(stream, 4);
         final int recordsNumber = (int) PdbUtil.readInt(stream);
         offset += 8;
         for (int i = 0; i < recordsNumber; ++i) {
           final int type = (int) PdbUtil.readInt(stream);
           final int size = (int) PdbUtil.readInt(stream);
           offset += size;
           if (size <= 8) {
             continue;
           }
           switch (type) {
             default:
               PdbUtil.skip(stream, size - 8);
               break;
             case 100:
               {
                 final byte[] buffer = new byte[size - 8];
                 stream.read(buffer);
                 String author = new String(buffer, encodingName);
                 final int index = author.indexOf(',');
                 if (index != -1) {
                   author =
                       author.substring(index + 1).trim()
                           + ' '
                           + author.substring(0, index).trim();
                 } else {
                   author = author.trim();
                 }
                 book.addAuthor(author);
                 break;
               }
             case 105:
               {
                 final byte[] buffer = new byte[size - 8];
                 stream.read(buffer);
                 book.addTag(new String(buffer, encodingName));
                 break;
               }
           }
         }
       }
     }
     PdbUtil.skip(stream, fullNameOffset - offset);
     final byte[] titleBuffer = new byte[fullNameLength];
     stream.read(titleBuffer);
     book.setTitle(new String(titleBuffer, encodingName));
   } catch (IOException e) {
     throw new BookReadingException(e, book.File);
   } finally {
     if (stream != null) {
       try {
         stream.close();
       } catch (IOException e) {
       }
     }
   }
 }