<p>Richard Feynman’s QED or Six Not-so-easy-pieces would be more helpful to read. </p>
<p>But why Sagan? There are too many answers to this, but I will just say that he is the only person to ever make turtle-necks acceptable.</p>
<p>Richard Feynman’s QED or Six Not-so-easy-pieces would be more helpful to read. </p>
<p>But why Sagan? There are too many answers to this, but I will just say that he is the only person to ever make turtle-necks acceptable.</p>