I thank my agent, Laura Fillmore, and Paul Musgrave, Bill Bloch, Dru Jarrett, Jeff Jarrett, and Steve Ryner, for help far above and way beyond. I thank Mike Dunn, Andy Hanson, Derick Wood, and John Holland for helping to make this book possible. For critiques and discussions, I thank Lori Agan, Emily Anderson, Ricardo Baeza-Yates, Lucy Battersby, Lindsay Biegel, Katy Boerner, T. C. Bradley, Willow Brugh, Libby Bulloff, Rebecca Burns, Tracy Canfield, Sarah Canfield-Fuller, Joe Culberson, Abe Dashiell, Bryan Dawson, Andrea Donderi, Russell Duhon, Sean Ellis, Julie England, Justin Eylander, Matt Farrellee, Jerry Fenner, Mary Field, Melanie Foust, John Gallman, Rob Goldstone, Melissa Harrold, Laura Hayden, Allison Hendricks, Laura Hopkins, Jamia Houston, Erin Huberty, Terry Jones, Kristy Kallback, Eric Kisling, Nick Krabbenhoeft, Cosmos Krejci, Dan Lash, Megan Lewis, Sarah Loos, Melissa Lorenzen, Kate Malloy, Suzanne Menzel, Karen Miller, Priscilla Parris, Donna Raskin, Jayna Reichers, Adam Reynolds, Amr Sabry, Steve Simms, Alek Slominski, Olaf Sporns, Andrea Spray, Christine Stanley, Will Stubbs, Claire Sullivan, Damien Sullivan, Mike Sullivan, Sarah Taylor, Raja Thiagarajan, Thiagi Thiagarajan, Fernando Tohmé, Ana Viglizzo, Ignacio Viglizzo, Laura Watkins, Gordon Weil, Steven Wennerberg, Dedaimia Whitney, Larry Yaeger, and the Indiana University classes and seminars of: I101, Spring 2000; I400, Spring 2003, Fall 2003, Spring 2006, Spring 2007; C102 Spring 2006 and Spring 2007; and I356 and B490 Spring 2008.