This textbook, co-authored by the prominent Soviet linguist Professor Olga Akhmanova, is designed for advanced students of English philology and linguistics. The course focuses on the core problems of practical English stylistics, functional styles, and register registers. It provides students with the essential theoretical framework and practical tools required to analyze various types of texts, including literary, scientific, and official styles. The book aims to develop students' linguistic intuition, helping them understand the nuances of word choice, synonymy, and stylistic devices in modern English. It serves as an invaluable resource for future English teachers, translators, and researchers in foreign languages.