I know every book of mine by its smell, and I have but to put my nose between the pages to be reminded of all sorts of things. – George Robert Gissing

Books, not which afford us a cowering enjoyment, but in which each thought is of unusual daring; such as an idle man cannot read, and a timid one would not be entertained by, which even make us dangerous to existing institution — such call I good books. – Henry David Thoreau