Any helpful resources for applied PDEs?

<p>Currently I am taking an engineering course called Mathematical Physics, using a book titled Applied Partial Differential Equations with Fourier Series and Boundary Value Problems.</p>

<p>I took my introductory diff eq (only ODEs) about 2 years ago, so a lot of this stuff is challenging to me. I've tried going back to my ODE notes/textbooks, but does anyone here have other helpful resources/study guidebooks/websites?</p>

<p>All help is appreciated.</p>

<p>This may or may not be as appealing as a direct link to a free textbook, but click through some of these [url=&lt;a href=“http://people.math.gatech.edu/~cain/textbooks/onlinebooks.html]here[/url”&gt;Online texts]here[/url</a>].</p>