"Defend the Realm - The Authorized History of MI5" by Christopher Andrew

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(Wall Street Journal) - Christopher Andrew is no stranger
to the secret world of Britain's intelligence community. As
the author of "The Mitrokhin Archive," (Amazon.com:
http://xrl.us/MitrokhinArchive ) an account of the KGB's
Cold War penetration of MI5's rival organization, the
Secret Intelligence Service (SIS), Mr. Andrew is used to
reconciling the sensitivities of top-secret intelligence
with the exigencies of providing a credible narrative.

For "Defend the Realm" (Amazon.com:
http://xrl.us/DefendRealm ), Mr. Andrew agreed to observe
three fundamental rules that would ensure against any
potentially compromising disclosures concerning MI5's modus
operandi. He refrained from revealing potential target
groups, the techniques used to track them or the agents
employed to provide the human intelligence.

Despite these restrictions, Mr. Andrew has succeeded in
producing a highly readable book that offers several
important new insights into MI5's operations over the past
century..

Continued: http://xrl.us/DefendRealm1