Not many can beat Graham Marsterton for gore. He is deeply into Native American mythology. His books veer on the Native Americans revenge of the White man. The first book I read of GM's was Manitou. It is a good book, but you have to remember it was written in the 70's and not as sophisticated as his later books.
The manitou is a series, the following books in the series are
1. Revenge of the Manitou
2. Burial
3. Spirit Jump
4. Manitou Blood
5. Manitou Armaggedon
He also wrote another series Night Warrior. In these stories the main character Stanley Eisner contracts the night plague during a very violent mugging. He has to find the source of the plague to save humanity The source - a witch lives in dreams and Stanley Eisner has to travel into peoples dreams to track the source down and kill the witch. far easier said than done.
The books are
1. Night Warriors
2. Death Dream
3. Night Plague
4. Night Wars
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