Learning English in a formal environment, pupils necessarily encounter difficulties such as lack of motivation and self-confidence. Yet, the aforementioned elements are critical in the process of a foreign language acquisition. The role of the teacher of English is to enhance these factors in the learners. To achieve his goal, he resorts to authentic materials that contain interactive activities. Moreover, the fact that pupils live in a society marked by a social phenomenon such as underage alcohol consumption, contributes to threaten their schooling and lives. That is why the teacher should associate the acquisition of English with moral value transmission, to ensure pupils a positive personal development. It is regarding such a standing point that The Mayor of Casterbridge by Thomas Hardy is proposed in this study as an authentic didactic source for English language acquisition and sensitization to alcohol consumption.