Euler's Idenity: Zero
 Euler's Identity Zero On "Pi Day," 3.14 (March 14), I posted about my books on the fundamental constants of Euler's Identity:       Missing from my set was zero.  I have since, acquired, and read the missing  biography of that component.        Here's the Euler set now... Charles Seife, in his  Zero, fills the void, or rather, illuminates the void.  Zero's inseparable companion, infinity... ∞ plays a major role.