This volume covers the remaining intermediate patterns, effectively bridging the gap to N2.
While official digital "repacks" are not sold by the publisher, several educational platforms provide legal alternatives and supplementary PDFs:
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)