Not for the literary squeamish, That Which You Should Know (TWYSK*) stimulates the reader's intellect and inclines them to ponder that of which was written. Those who have read Decartes or Hume can appreciate the challenge of digesting such a literary work. And although TWYSK* is not written in the vein of those treatises, it provokes the reader to summon their ability to make of it what they will. There is no doubt that TWYSK* will be one of the more memorable books one has encountered. All that is left to do is to conduct a cursory examination for oneself.