The JLPT N1 exam tests your ability to read high-level commentary, understand abstract concepts, and distinguish between subtle nuances in similar grammar points. Many textbooks simply give you a list of definitions, leaving you confused during the actual exam. Shin Kanzen Master takes a completely different approach:
Patterns are grouped by theme or functional similarity (e.g., science, daily life, similar-sounding words) rather than just alphabetical order. shin kanzen master n1 grammar pdf
A quick Google search for "Shin Kanzen Master N1 Grammar PDF" yields hundreds of links. There is a reason for this: The JLPT N1 exam tests your ability to