This is the first book in the Krozair cycle of the Dray Prescot books. There are three in this cycle and it's, in my opinion, the strongest cycle in the series.
If you are a John Carter of Mars fan or enjoy the "displaced person on another world" then this series is for you. The books run in long story arcs so you can read just a few to complete a plot line or go for the whole set. Akers creates a very complex world for the hero to adventure in. Recommended