The Nature of Things is Lucretius' Epicurean masterpiece, worry not about tomorrow, live for today. Fear not death and experience life here and now. Dangerous ideas when they were first composed, but the power of these words have helped shape modern science and our understanding of the universe. Lucretius was the first person to posit that the universe was infinite in both time and space.
Used availability for Gordon R Dickson's The Question
May 2013 : USA Paperback