Jack London 
War of the Classes 

Collection of essays, including The Class Struggle, The Tramp, The Scab, The Question of the Maximum, A Review, Wanted: A New Land of Development, and How I Became a Socialist. According to Wikipedia: ‘Jack London (1876 – 1916) was an American author who wrote The Call of the Wild, White Fang, and The Sea Wolf along with many other popular books. A pioneer in the then-burgeoning world of commercial magazine fiction, he was one of the first Americans to make a lucrative career exclusively from writing.’