-\item 2006--2014. Hill, Benjamin Mako, Matthew Helmke and Corey Burger. The Official Ubuntu Book. New York: Pearson. [Editions: 1\textsuperscript{st} (2006), 2\textsuperscript{nd} (2007), 3\textsuperscript{rd} (2008), 4\textsuperscript{th} (2009), 5\textsuperscript{th} (2010), 6\textsuperscript{th} (2011), 7\textsuperscript{th} (2012), 8\textsuperscript{th} (2014), 9\textsuperscript{th} (2016); Translations: German, Polish, Spanish, Japanese; 2006's best-selling Linux book]
+\item 2006--2016. Hill, Benjamin Mako, Matthew Helmke and Corey Burger. The Official Ubuntu Book. New York: Pearson. [Editions: 1\textsuperscript{st} (2006), 2\textsuperscript{nd} (2007), 3\textsuperscript{rd} (2008), 4\textsuperscript{th} (2009), 5\textsuperscript{th} (2010), 6\textsuperscript{th} (2011), 7\textsuperscript{th} (2012), 8\textsuperscript{th} (2014), 9\textsuperscript{th} (2016); Translations: German, Polish, Spanish, Japanese; 2006's best-selling Linux book]