Joseph Greenberg 
Language Typology [PDF ebook] 
A Historical and Analytic Overview

“Greenberg’s survey of the earlier history of typology is without rivals, a must read for every linguist who is curious about the intellectual roots of current typology. This wouldn’t be a work by Greenberg if it didn’t go far beyond simple historiography, providing a highly original and readable framework for understanding the earlier efforts.”
Prof. Dr. Martin Haspelmath, Max-Planck-Institut für Evolutionäre Anthropologie