Now in his fifties, Richard Hannay is called upon to fulfill an old promise. Haraldsen, an acquaintance from Hannays days as a British spy, is dying, and demands that Hannay protect his son, Valdemar, who is about to inherit the secret to a great treasure. But enemies from Hannays past, including the infamous D'Ingraville, want in on the prize and will stop at nothing to get their hands on Valdemar. With the help of his old allies and teenage son, Peter John, can Hannay keep Valdemar, and the secret treasure, safe?The Richard Hannay series, including The Thirty-Nine Steps, Mr. Standfast, The Three Hostages, and Greenmantle, established John Buchan as an original thriller writer and pioneer of espionage fiction. The Island of Sheep is the fifth and final book in the series.HarperPerennial Classics brings great works of literature to life in digital format, upholding the highest standards in ebook production and celebrating reading in all its forms. Look for more titles in the HarperPerennial Classics collection to build your digital library.