Joel Greenberg

The Times - 20 December 2014

Sir John Scarlett KCMG OBE, former Head of MI6, chooses Gordon Welchman: Bletchley Park's Architect of Ultra Intelligence as his favourite title of the year.

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Cryptologia - 20 December 2014

"...buy it... it is among the best of the myriad of books by or about the 'star performers' at Bletchley Park (BP) before and during those heady days of World War II and extending into the post-war period".

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Army Rumour Service - 8 April 2017

"This competent and comprehensive biography covers the life of Gordon Welchman".