The real strength of this book is the depiction of water/ocean and diving.  The world Peter creates when talking about being under water is amazing and realistic.  The atmosphere of wonder mixed with menace is amazing.  But for me that’s where this stops being enjoyable the main characters are underdeveloped and a cross between boring and annoying.  The bad guys are lazy racist stereotypes, the only character vaguely interesting is Treece.  And all in all the plot is just boring.