Since GoodReads won't allow it, officially this is a three and a half star read. It took a lot of work to get it there. Halfway through this book, I was so frustrated with this book that I nearly quit on it. Three reasons for this: 1. This third book of the series followed two superb novels and this was not living up to the billing. Instead of a page turner, it was becoming a book burner.
2. A pet peeve of mine - a major character within a series has a character flaw, goes through a difficult but inevitable transformation by the end of a book...then repeats it all over again in the next book. This happened in the Pendergast Series of Preston and Child with Laura Hayworth, police detective who took an entire trilogy to be able to understand and respect Pendergast, allowing her husband, a cop friend, to help. Then the very next book, she's right back to where she started. A character achieves growth, then the author forgets that for lack of a better subplot for tension. In "Night of the Jaguar", we have Jimmy Paz's wife repeating the same unsupportive militant atheism that she had to battle through in "The Valley of Bones". To a point, I understand this is realistic. People make a spiritual journey, fall back hard and pretend it's always been that way. However, it makes it frustrating for the reader.
3. Lack of an interesting new character. In book 1 (Tropic of Night) we had Jane Doe, the fascinating anthropologist who was bold, smart and armed with martial arts mastery. In Book 2 (Valley of Bones), we had Emiylou Dieteroff, an eccentric woman with a very interesting background as well as Lorna Wise, soon to become Jimmy's wife, her struggles with her hypochondria and her self-image. In Book 3, we have a lot of new characters, but none that makes the reader want to keep going on.
At the halfway point, the book's action and mystery finally started its downhill slide, intense enough to overcome the shortcomings of the book. Some things about characters become clearer, and the ending is reached on a satisfactory note. Also, as a plus, the supernatural elements are back to the level of the first book, and amped up a notch. So, while this is clearly the weakest of the Jimmy Paz series, and while no reader should dare start with this book before reading the others, fans who have read books one and two should be patient and stick with this to the end.