Karen N. Johnson is an independent software test consultant and a frequent speaker at conferences. She is a contributing author to the book, Beautiful Testing,(O’Reilly) and has published numerous articles and blogs about her experiences with software testing. You can visit her website at http://www.karennjohnson.com, where she offers a number of classes, including one on Paired Testing. She is also the co-founder of the WREST workshop. More information on WREST can be found at: http://www.wrestworkshop.com/Home.html.