Sharpen your mind to beat the smartest brains in Britain with the original official GCHQ puzzle bookWould GCHQ recruit you? Pit your wits against the people who cracked Enigma in the official puzzle book from Britain's top secret intelligence and security organisationOver the years, their codebreakers have helped keep our country safe, from the Bletchley Park breakthroughs of WWII to the modern-day threat of cyber attack. So it comes as no ...

As we become ever-more aware of how our governments “eavesdrop” on our conversations, here is a gripping exploration of this unknown realm of the British secret service: Government Communication Headquarters (GCHQ).GCHQ is the successor to the famous Bletchley Park wartime code-breaking organisation and is the largest and most secretive intelligence organisation in the country. During the war, it commanded more staff than MI5 and MI6 combined and has produced a number of intelligen...

The go-to intelligence expert and author of MI6 has "provided the clearest review of GCHQ and its predecessors in a publicly available book" ( Firetrench).Signal intelligence is the most secret, and most misunderstood, weapon in the modern espionage arsenal. As a reliable source of information, it is unequalled, which is why Government Communications Headquarters, almost universally known as GCHQ, is several times larger than the two smaller, but m...

FULLY UPDATED CENTENARY EDITION‘An important book’ Max Hastings, Sunday Times‘An intriguing history of covert surveillance … thoroughly engaging’ Daily TelegraphGCHQ is the largest and most secretive intelligence organisation in the UK, and has existed for 100 years – but we still know next to nothing about it.In this ground-breaking book – the first and most definitive history of the organ...

A killer with a conscience.For 45 years, Emily lived a kind, unremarkable life—until she discovered a terrifying truth: she has a lethal, uncontrollable ability and has unknowingly murdered hundreds of people. Now, GCHQ's Section Six has tracked her down, not to arrest her, but to recruit her. Can a reluctant killer become the world's most effective hero?

"The expertly researched biography of the man who created and led the British intelligence organization best known for cracking the Nazi's codes." — Midwest Book ReviewSome of the individuals who played key roles in the success of Bletchley Park in reading the secret communications of Britain's enemies during the Second World War have become well-known figures. However, the man who created and led the organization based there, from its inception in 1919 un...

Following on from the enormous success of his bestseller, The Secret Life of Bletchley Park, renowned author Sinclair McKay uncovers the story of what happened after the end of the Second World War.Once victory was declared, many of the individuals who had achieved the seemingly impossible at Bletchley Park by cracking the impenetrable Enigma codes and giving the Allies an invaluable insight directly into the Nazi war machine, moved on to GCHQ. This was the British governm...

Bloomsbury presents Behind the Enigma by John Ferris, read by Charles Armstrong.'Fascinating … This monumental work completes the authorised picture of a century of British intelligence' BEN MACINTYRE, THE TIMES'[A] revelatory look at the world of GCHQ … There is much in the book that illuminates' Mark Urban, Sunday TimesYou know about MI5. You know about MI6.Now uncover the mystery behind Britain’s most secretive intelligence agency, in the first ever author...

Three students discover a get-rich-quick scheme. Enough to get a special invitation from the government. Enough to get interest from several governments, with explosive consequences.Secrets, shadowy fixers and mystery locations abound as the players mix with security forces in a game of cat and mouse.Have you ever wished you could un-invent something?

Train your brain with these fiendishly difficult puzzles, the perfect companion for anyone wanting to keep their mind busy'Fiendishly tricky' Daily MailWith their first bestselling book, The GCHQ Puzzle Book, the UK's intelligence and security experts tested us with puzzles, codes and real-life entrance tests from their archives.Now, they are back with a NEW collection of head-scratching, mind-bogg...

Ronald Koorm has given talks and lectures on the codebreaking outstations for several years ‒ this is the last piece of the amazing Bletchley jigsaw.Full of extraordinary stories: who built the first electronic digital computer? Tommy Flowers ‒ but not at Bletchley ‒ at Dollis Hill!The first detailed study of the Bombe registers at the National Archives, which brings a new understanding of the perennially fascinating Bletchley story.Ronald Koorm explores the complex...