Essentially a DM Screen for Players, this is a collection of tables of specific use to players and not the DM, you get Hit Roll and Saving Throw charts, Thief Abilities and Cleric Turning tables, Spell lists for Clerics, Druids and Magic-Users and lastly XP and level advancement table for all classes in D&D. 

In a bit of a weird twist, for what is ostensibly a product for players, this includes a small adventure, but not a solo adventure, one which requires a DM and party to play through, so players shouldn’t really read through it. Written by Bruce Nesmith (who would later develop such obscure games as Skyrim) you would get home from buying this collection of tables and then have 8 pages at the end that you really shouldn’t read… not ideal design in my opinion. So, in reality this is really aimed at the DM who would have the tables available to players during game sessions, rather than players themselves. However, it does make sense for TSR to make it look like Players could benefit from buying this, from a business perspective, there’s only one DM per table, while there’s a whole bunch of players that aren’t spending any money! 

The adventure itself is just a small set up for a larger campaign that the DM would have to come up with themselves. The suggestion of the module is that the player would go through this tower known as the Spindle of Heaven, defeating tough opponents to, at the end, defeat a boss and learn a clue to achieve immortality. A hint at the future Immortals Rule Set. However the DM can make it about anything they want.