I've encountered quite a few fictional log-books over the years.
But generally the greatest works of fictions are contained in CV's. The helicopter industry is an unknowing nurturer of fictional writing skills!
But if you want to hear some good helicopter fiction - just hit the crew room on any given day. If you still didn't get enough, then try assembling the same individuals in the pub in the evening!
Best (fictional) story I ever heard was the guy that landed on a whale!