Do not choose between them. Use TTMIK for grammar drills, use Korean Grammar in Use as a dictionary, but use Assimil for your daily "core" lesson.
: First 50 lessons. You listen, read, and understand without trying to speak. assimil korean pdf
What is your (Total beginner or know some Hangul)? Do not choose between them
Panic flared. He tried English, then broken Korean. She just tilted her head, uncomprehending. Then he remembered the PDF's golden rule: The language isn't a tool; it's the map. it's the map.