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This year marked the centenary of the birth of Alan Mathison Turing; among the many, many commemorative events that occurred during the Alan Turing Year were the reissues of two biographies of AMT. One was Andrew Hodges's extraordinary work Alan Turing: The Enigma. The other was Sara Turing's long-unavailable book about her son, simply titled Alan M. Turing, which was originally published a few years after AMT's suicide in 1954. New material by Martin Davis and a contemporaneous (and disturbingly homophobic) memoir by AMT's brother John included here further illuminate our understanding of a brilliant man horribly mistreated on account of his homosexuality and to whom we all owe a great debt.