File description from Compuserve Game Publishers Forum:

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DQKFIX.ZIP/Bin  Bytes: 383936, Count:   85, 26-Jun-92

  Title   : DARK QUEEN OF KRYNN Update Patch (IBM)

  This is a patch for DQK. It fixes the bug with the book not being in the
  dumbwaiter and requires less RAM memory to install to EGA. May the quest
  continue.
  
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To install this fix, copy the two .GLB files into the
game's DISK3 subdirectory, overwriting the versions
which are already there...  I tested this and it seems
to work fine.