In my amazon shopping cart I currently have:<div><br></div><div><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; "><b><a href="http://www.amazon.com/gp/product/052171916X/ref=ord_cart_shr?ie=UTF8&amp;m=ATVPDKIKX0DER" style="font-family: verdana, arial, helvetica, sans-serif; color: rgb(0, 75, 145); ">Conceptual Mathematics: A First Introduction to Categories</a>  </b></span><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; ">- F. William Lawvere</span></div>
<div><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; "><br></span></div><div><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; "><b><a href="http://www.amazon.com/gp/product/0387984038/ref=ord_cart_shr?ie=UTF8&amp;m=ATVPDKIKX0DER" style="font-family: verdana, arial, helvetica, sans-serif; color: rgb(0, 75, 145); ">Categories for the Working Mathematician (Graduate Texts in Mathematics)</a> </b>- Saunders Mac Lane</span></div>
<div><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; "><br></span></div><div><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; "><b><a href="http://www.amazon.com/gp/product/0521422264/ref=ord_cart_shr?ie=UTF8&amp;m=ATVPDKIKX0DER" style="font-family: verdana, arial, helvetica, sans-serif; color: rgb(0, 75, 145); ">Categories and Computer Science (Cambridge Computer Science Texts)</a> </b>- R. F. C. Walters</span></div>
<div><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; "><br></span></div><div><font class="Apple-style-span" face="verdana, arial, helvetica, sans-serif">Are all 3 of these worthwhile?  Any of them?  </font></div>
<div><font class="Apple-style-span" face="verdana, arial, helvetica, sans-serif"><br></font></div><div><font class="Apple-style-span" face="verdana, arial, helvetica, sans-serif">I&#39;m just trying to get a grasp on enough Category Theory to be able think more deeply about programming in general, and maybe grasp more Haskell terminology beyond the seemingly superficial meanings I understand today.</font></div>
<div><font class="Apple-style-span" face="verdana, arial, helvetica, sans-serif"><br></font></div><div><font class="Apple-style-span" face="verdana, arial, helvetica, sans-serif">Thanks!</font></div><div><font class="Apple-style-span" face="verdana, arial, helvetica, sans-serif"><br>
</font></div><div><span class="Apple-style-span" style="font-family: verdana, arial, helvetica, sans-serif; ">Dave</span></div>