Star Trek Log Four, Log Five, Log Six
For the first time, all three books in one volume!

Star Trek Log Four, Log Five, Log Six is a compilation of Star Trek Log 4, Star Trek Log 5, and Star Trek Log 6, written by Alan Dean Foster. Published by Del Rey, it was first released in .

Summary 
From the book jacket
Nine thrilling adventuresFeaturing Captain Kirk and the crew of the 

Log Four
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Log Five
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Log Six

 Background information 
 Not to be confused with Star Trek Logs 4-6'', a omnibus released by Pocket Books to the UK and Australia in  with near-identical formatting.

Log Four, Log Five, Log Six
Log Four, Log Five, Log Six