private static void addMonsterBookInfo(MaplePacketLittleEndianWriter mplew, MapleCharacter chr) {
        //  mplew.writeInt(chr.getMonsterBookCover()); // cover
        mplew.writeInt(0);
        mplew.write(0);
        mplew.writeShort(0);
        // Map<Integer, Integer> cards = chr.getMonsterBook().getCards();
        // mplew.writeShort(cards.size());
        // for (Entry<Integer, Integer> all : cards.entrySet()) {
        //   mplew.writeShort(all.getKey() % 10000); // Id
        // mplew.write(all.getValue()); // Level
        // }
    }