Blue and Brown Books - Wittgenstein, Ludwig (Philosopher) a Docherty, Peter (National Institute for Working Life)

Offers unfinished sketches for "Philosophical Investigations". This title contains: The "Blue Book" - A set of notes dictated to Witgenstein's Cambridge students and The "Brown Book" - A draft for what eventually became the growth of the first part of "Philosophical Investigations". It is intended for students of Witgenstein's thought.