Kyubyong Park works at a Korean publishing company that creates practice books for Koreans learning English.

"This was such a delightful book! I'd like to note that this book truly IS for beginners wanting to learn the language without having to take a class. the way Park Kyubyong Songsaengnim (with the help of Henry J. Amen IV) has set up the book works quite well with learning to read + write Hangul and the included cd-rom helps with pronunciation. I appreciate at how casually it's written as well, allowing you to take a breather at the more challenging parts while still hammering home all the needed details ... if you're interested in learning the language, I definitely recommend that you start with this book." --Goodreads

"So far, as explanations of Korean grammar go, this was the best resource I've come across. It explains complex grammar in ways that make them easy to understand and replicate in other contexts." --Eurolinguiste blog