Call for the Dead by John le Carré

An apparent suicide. A deepening mystery. A letter from a dead man...

Secret agent George Smiley is in trouble. A Foreign Office civil servant, Samuel Fennan, has killed himself, and Smiley realizes that Intelligence head Maston is going to set him up to take the blame. Beginning his own investigation, Smiley is shocked to receive an urgent letter from the dead man, and slowly uncovers a network of deceit and betrayal. Le Carré's debut novel was also the first of his many books to feature the tenacious, unassuming and singular George Smiley.