When I went through my late aunt's needlecraft boxes,

I found a couple of odd-looking crochet hooks. They looked like straight knitting needles--but had a crochet needle tip.

Since one hook was still in its original packaging, I wasn't left in the dark for too long. Afghan hook--$1.00.
Next I turned to google and entered a whole new needlecraft world. Afghan crochet aka as Tunisian crochet.
Then I happened upon the Winter 2009 issue of Interweave Crochet and learned even more about Tunisian crochet.

With an afghan hook and some yarn in hand, I went back to the internet to learn how to use these afghan hooks.

This is the most basic stitch--the Afghan Stitch. But there's many, many more stitches and a ton of patterns.
Working on this little swatch was a lot of fun and maybe, perhaps my "T is for. . . . " will be a more substantial example of Tunisian crochet.