Lucretius 
Of the Nature of Things [EPUB ebook] 

Classic work of philosophy, in English translation. Titus Lucretius Carus (ca. 99 BC – ca. 55 BC) was a Roman poet and philosopher. His only known work is an epic philosophical poem laying out the beliefs of Epicureanism, De rerum natura, translated into English as On the Nature of Things or 'On the Nature of the Universe’.