"Pitcairn's Island" by Charles Nordhoff
& James Norman Hall 
This is Book III of the Bounty Trilogy.
If you wonder what happened to Fletcher Christian and the other mutineers from the Bounty, this is their story. I personally could not finish it. I got to the point where I could care less who was swapping mates, getting drunk, beating up who, and just generally being worthless.
Reviewed by Kenneth S. Smith, 8 December 1999
Available from numerous publishers over the years
