Used a little of pages for the 1st book only. A good learning book from Yonsei univ which is very hard to find in MY Included CD I bought this from Gmarket * I mostly wrapped all my books to keep it clean from dirts. Good for intermediate level learner👍🏻 This book have good reviews if you google it on the internet. A lot of korean learners from all over the world use this book as their reference. Hard to find this book in Malaysia and its only sell in oversea.