Reading Romaji can cause English speakers to apply English phonetic rules to Japanese words, leading to a unnatural accent. A Critical Note on PDFs and Copyright

Buy a physical copy of the textbook to keep on your desk, and use free digital flashcard tools like Anki or Memrise to build decks based directly on the Minna no Nihongo vocabulary lists.

The standard version of Minna no Nihongo Honsatsu is written entirely in Japanese scripts (Hiragana, Katakana, and Kanji). While this immersion is highly effective, it presents a steep learning curve for absolute beginners who have not yet mastered reading Japanese characters.

If you're interested in learning Japanese, I highly recommend the Minna no Nihongo Honsatsu Romaji PDF 16 2021 edition as a starting point or supplement to your studies. However, I also suggest complementing it with other resources, such as audio materials, kanji practice books, and online courses, to ensure a well-rounded learning experience.