MENTAL EFFICIENCY (UNABRIDGED‪)‬

In this light-hearted yet thought-provoking collection of articles, Bennett offers his thoughts on exercising the mind, organising your life, the advantages of marriage and other pocket philosophies.The book stands the test of time, and much is still relevant and amusing - perhaps even more so, with nearly 100 years of hindsight, than when it was originally written.The book "X" to which Bennett refers in Chapter 5 is An Essay on the Principle of Population by Thomas Malthus, of which there is also a Librivox recording.