Reviews The Annotated Turing: A Guided Tour through Alan Turing’s Historic Paper on Computability and the Turing Machine by Charles Petzold Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Science News December 19, 2008 at 9:46 pm A programmer and best-selling author expands Turing’s 36-page paper by adding historical and intellectual background. Wiley, 2008, 372 p., $29.99. The Annotated Turing: A Guided Tour through Alan Turing’s Historic Paper on Computability and the Turing Machine by Charles Petzold