Here are some books that I find helpful and would recommend to someone who is learning Portuguese on their own:
Living Language Brazilian Portuguese, Complete Edition is a full course which goes from beginner to advanced level, including 3 books, 9 audio CDs, and a free online learning platform. This program builds steadily and reviews previous lessons and skills to help increase the retention rates.
Portuguese For Dummies offers practical lessons, cultural facts, and handy references – including a Portuguese-English mini-dictionary, lists of vital verbs, and more. It is perfect for a student, a traveler, or a businessman.It comes complete with a CD loaded with real-life dialogues that help you with pronunciation.
Practice Makes Perfect: Basic Portuguese offer bite-sized lessons which guide you through simple grammar and vocabulary concepts and illustrates them with clear examples.
The accompanying fun and interesting exercises allow you to practice all that you have learned plenty of times.
Portuguese Short Stories For Beginners offers a different, practical and fun way to learn Portuguese. These 10 thrilling Portuguese short stories were specifically prepared to eliminate the stress of traditional studying. Your objective is to simply focus on a single short story at a time.
They are suitable for beginners, intermediate learners and anyone for wants to learn the Portuguese language. This book includes the summaries of each story in English.
The Everything Learning Brazilian Portuguese Book with CD provides you with step-by-step instruction in vocabulary, grammar, and pronunciation, helping you learn how to: ask questions in Portuguese and have basic conversations with locals wherever you go.
Lonely Planet Portuguese Phrasebook & Dictionary gives the pronunciation of every Portuguese word and sentence listed in a format that any English speaker can reasonably duplicate. It seems to cover just about any topic one can think of, including
Portuguese cuisine. It contains a Portuguese-English and English-Portuguese dictionary section in the back. It is thorough, well-prepared and informative. It’s small enough to fit into a pocket or handbag.