public static byte[] getMonsterBookInfo(MapleCharacter chr) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

        mplew.writeShort(SendPacketOpcode.BOOK_INFO.getValue());
        mplew.writeInt(chr.getId());
        mplew.writeInt(chr.getLevel());
        chr.getMonsterBook().writeCharInfoPacket(mplew);

        return mplew.getPacket();
    }