Novel about a parallel world where the dominant species is reptilian. Some humans (or a human?) are captured and their way of life is threatened. Very severe race with different clans at war with each other. Read this 25-30 years ago. I think the word east or west is in the title.

Any ideas what this is?

Novel about a parallel world where the dominant species is reptilian. Some humans (or a human?) are captured and their way of life is threatened. Very severe race with different clans at war with each other. 

Read this 25-30 years ago. I think the word "east" or "west" is in the title.

Novel about a parallel world where the dominant species is reptilian.Some humans or a human? is captured and their way of life is threatened. Very severe race with different clans at war with each other. Read this 25-30 years ago. I think the word east or west is in the title.

Novel about a parallel world where the dominant species is reptilian. Some humans (or a human?) are captured and their way of life is threatened. Very severe race with different clans at war with each other. Read this 25-30 years ago. I think the word east or west is in the title.

Any ideas what this is?