Great books are great in part because of what they ask of their readers: they are not readily encountered, easily assessed.
The book that simply demands to be read, for no good reason, is asking us to change our lives by putting aside what we usually think of as good reasons. It's asking us to stop calculating. It's asking us to do something for the plain old delight and interest of it, not because we can justify its place on the mental spreadsheet or accounting ledger (like the one Benjamin Franklin kept) by which we tote up the value of our actions.
