Mass market paperback.

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From the Publisher

Navigating readers through the shadow worlds of international espionage with critical knowledge culled from his years in British Intelligence, le Carré tracks the dark and devastating trail of a document that could profoundly alter the course of world events.

In Moscow, a sheaf of military secrets changes hands. If it arrives at its destination, and if its import is understood, the consequences could be cataclysmic. Along the way it has an explosive impact on the lives of three people: a Soviet physicist burdened with secrets; a beautiful young Russian woman to whom the papers are entrusted; and Barley Blair, a bewildered English publisher pressed into service by British Intelligence to ferret out the document's source.

RELEASE NOTES:

Left on the bookshelf in the guests' computer room.

I have enjoyed all of Le Carre's books and this one as well

CAUGHT IN HUTCHINSON KS USA