Did they close down? Or do they still publish books in Korean, but just not in English anymore?
I’m looking for their Jump Level Up books. I heard there are more Jump Level Up (like level 6 and so on) and similar books from them that goes beyond. But only in Korean.
I like their drills.
edit: Fun fact, looking at their archived website, ¹ÙµÏÅäÇÇ¾Æ ·¹º§½Ã¸®Áî Á¶°ßÇ¥, it seems the English translation oversold the rating. Jump Level Up seems to be meant for 18 kyu to 25 kyu.
The yellow-highlighted ones are planned books that are not written yet.