Discover 20 Things

First off, apologies for the title. We know, it’s absurd. You Didn’t Know About Everything, indeed! For one thing, 20 Things there are surely many more than 20 things that you—like all of us—don’t know about any one thing. On another level, it’s obvious to anyone smart enough to read the title that no book can possibly contain even one thing you don’t know about every single thing! That way lies infinity, madness, an impossibly bulky volume.