Tractatus Logico-Philosophicus is the only book I&#x27;ve never managed to get past the first page. It&#x27;s <i>really</i> hard to read - Wittgenstein actually numbered all the <i>paragraphs</i> so they can be discussed individually it&#x27;s so dense. I&#x27;d still recommend picking up a copy though, because there&#x27;s a foreword by Bertrand Russell that&#x27;s really worthwhile reading.