On the 100th anniversary of Turing's birth (1912-1954), Davis (emeritus, mathematics, New York University), known for his work on Hilbert's tenth problem and model of post Turing machines, pays homage to the achievements of this genius and six predecessors who contributed to today's universal (i.e., all-purpose) computers: Leibnitz, Boole, Frege, Cantor, Hilbert, and Gödel. This update of the 2000 edition includes images of the thinkers featured, examples of their logic, and comments on IBM's winning Watson computer on the TV quiz show Jeopardy. Annotation ©2012 Book News, Inc., Portland, OR (booknews.com)