"The exercise of teaching in English" is a non-fiction book that addresses the pedagogical practice of English language teachers in various educational institutions. It examines the challenges and gaps in the training of English teachers that influence their pedagogical actions and professional identity. The book sheds light on the reality in which English teachers work and reflects on how they perceive themselves as professionals. A central theme is the dynamic nature of identity, shaped by social interactions and the historical and cultural context. By analyzing the experiences and perspectives of teachers, it enables a deeper understanding of their actions and professional development. The author, Thaís Valim Ramos, provides valuable insights into the complex relationships between identity, practice, and the professional self-concept of educators.