James Bogen 
Wittgenstein”s Philosophy of Language [PDF ebook] 
Some Aspects of its Development

First published in 2005. This book studies the often overlooked work of Ludwig Wittgenstein”s Tractatus Logio-Philosophicus, the Tractatus and their later work being argued as being mutually illuminating. Bogen states that the works of Wittgenstein require a study of their points of contact which led to the formation of this title. This is accomplished by studying the text in two parts: its relevance to picture theory, the subsequent abandonment of the picture theory.