When it comes to learning Brazilian Portuguese, there are several excellent textbooks and resources available. Here are some highly recommended ones:

1. “Ponto de Encontro: Portuguese as a World Language” by Clémence de Jouët-Pastré et al.: This comprehensive textbook is widely used in university courses for Portuguese language learners. It covers all aspects of the language, including grammar, vocabulary, listening, speaking, reading, and writing. It also includes cultural insights and engaging activities.

1. “Falar, Ler, Escrever Português: Um Curso para Estrangeiros” by Emma Eberlein O. F. Lima et al.: This textbook is commonly used in intensive Portuguese language courses. It offers a systematic approach to learning the language and provides ample practice exercises to reinforce your skills.

1. “Modern Brazilian Portuguese Grammar: A Practical Guide” by John Whitlam: This grammar guide is a valuable resource for learners who want to deepen their understanding of the Portuguese language. It covers essential grammar rules, verb conjugations, sentence structure, and more. It also includes examples and exercises to help you apply what you’ve learned.

1. “Portuguese Verbs & Essentials of Grammar” by Sue Tyson-Ward: This book focuses specifically on Portuguese verb conjugations and grammar essentials. It is a concise and practical guide that helps learners grasp the nuances of verb usage and sentence construction.

1. “Practice Makes Perfect: Basic Portuguese” by Sue Tyson-Ward: This workbook is filled with exercises to practice and reinforce your Portuguese language skills. It covers essential grammar points, vocabulary, and conversational phrases. The exercises progress in difficulty, allowing you to gradually improve your proficiency.

1. Duolingo (duolingo.com): Duolingo is a popular language learning platform that offers a Brazilian Portuguese course. It’s a convenient and interactive resource where you can practice reading, writing, listening, and speaking skills through bite-sized lessons.

1. italki (italki.com): italki is an online language learning platform where you can find Brazilian Portuguese tutors for personalized one-on-one lessons. It’s an effective way to practice speaking and receive feedback from native speakers.

Remember to supplement your learning with authentic materials such as Brazilian movies, music, podcasts, and news articles. Immersing yourself in the language and culture will greatly enhance your proficiency in Brazilian Portuguese.