The textbook serves as both a student's book and an exercise book in one, making it a compact and complete tool. The series is known for its action-oriented approach, which turns the classroom into the perfect context for language learning and immediate communication.
While the core textbook requires a purchase or institutional access, the publisher offers several free resources online to support your studies: aula internacional plus 3 pdf link
If you are looking for specific units or previews before buying, these sources often host PDFs: The textbook serves as both a student's book