<p>^^^I read a little bit of Principia everyday after volleyball practice, the whole team thinks I'm the biggest nerd in the world...</p>
<p>I take it this is Tom Apostol. His Calculus Books are the best.</p>
<p>Yes, I think you are right. After the first few pages, Rudin gets very unfriendly. :p </p>
<p>Do you have Arnold's ODE?</p>
<p>No. There are too many books. I'm just content with Boyce/DePrima for now :p (as non-rigorous as it is - it's still used for Caltech's math courses)</p>