Infocom - Zork 1 for IBM MS-DOS 2.0 with Map and Used Invisiclue Hint Booklets

I don't think the game is complete so see the photos for what is included. 

The Invisiclue hint book has been used. 

There is a generic disk labeled "beyond zork" that I found in the box so I will include it but must assume it is blank or contains something else. See photos.

Ships with USPS.