Here is a very interesting and hard to find copy of “Self Knowledge: A Treatise, Showing the Nature and Benefit of That Important Science, and the Way to Attain It. Intermixed With Various Reflections and Observations on Human Nature” by John Mason, published in 1809. This leather bound book is in good condition, some cover and spine wear, tight binding but the front end paper is missing, pages have foxing and stains. Check out some of the interesting contents in this book! It measures approximately 3 ¾” x 5 ¾” and contains 211 pages. A great book for any collection!