added Carl to title page

book.tex

@@ -86,7 +86,10 @@ escapechar=@
 
 \author{\textsc{Jeremy G. Siek} \\
 %\thanks{\url{http://homes.soic.indiana.edu/jsiek/}} \\
-  Indiana University
+  Indiana University \\
+  \\
+  with contributions from: \\
+  Carl Factora
    }
 
 \begin{document}