The Thirty-Nine Steps

Libro Usado, Tapa Blanda. The story follows Richard Hannay, a Scotsman who has recently returned to London after spending years in South Africa. Bored with his predictable life in the city, his routine is shattered when a panicked neighbor named Franklin P. Scudder knocks on his door. Scudder reveals he has uncovered a massive international conspiracy: a German spy ring known as the "Black Stone" plans to assassinate the Greek Premier and steal British naval secrets, which could trigger a world war.