http://www.amazon.com/dp/B019Y5V1G8

Manual of comparative linguistics: Prefixation Ability Index (PAI) and Verbal Grammar Correlation Index (VGCI)
(Kindle Edition)

The book is about precise typological methods of comparative linguistics: Prefixation Ability Index and Verbal Grammar Correlation Index. These two methods allow us to detect very distant relationship of languages by direct comparison of their structures and without making reconstructions.