Advanced Keigo (honorifics) and Kenjougo (humble speech) suited for business contexts.
For self-study, the "Grammar Notes" companion is essential, as the main Honsatsu (textbook) is written entirely in Japanese. Key Grammar Points Covered (N3 Level) Minna No Nihongo N3 Grammar Pdf REPACK
The Minna no Nihongo series is structured into four main levels. For N3 preparation, you should focus on the following: the "Grammar Notes" companion is essential
Learners typically seek "repack" versions because they often bundle the following grammar categories found across the Chukyu series: Minna No Nihongo N3 Grammar Pdf REPACK