The Island of Sheep (1936), John Buchan's last thriller, features the return of Richard Hannay, the hero of The Thirty-Nine Steps, Greenmantle, Mr Standfast, and The Three Hostages. A long-lost comrade, a key to buried treasure, and a blood-feud jolt Hannay out of his comfortable but boring retirement. Remembering an oath sworn long ago under an African moon, he agrees to help the son of a former acquaintance seek refuge from a diabolical conspiracy. The action moves from England through the Scottish Borders to the Island of Sheep in the remote Norlands, where Hannay and his friends turn at last to confront the villains. Memorable for its vivid evocations of place, the novel reflects upon its own position at the end of Buchan's career, and at the end of a modern Scottish tradition of adventure romances.This is the first critical edition of The Island of Sheep, with extensive notes and an introduction exploring the novel's themes and preoccupations in relation to Buchan's previous works.